Bug fix for I420ToI400 and unittest all I420To packed formats.  Most import of the new I420 tests is I420ToYUY2.
BUG=none
TEST=libyuvTest.I420ToI400_OptVsC
Review URL: https://webrtc-codereview.appspot.com/767004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@331 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=71
TESTED=build\release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=libyuvTest.*OptVsC
Review URL: https://webrtc-codereview.appspot.com/764004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@330 16f28f9a-4ce2-e073-06de-1de4eb20be90

- Add Clang as dependency to make building on Mac possible.
- Add gold linker for Unix platforms
- Replace Cygwin with WebRTC's slimmed down version for Win.

Dependencies updated to the Chrome revision WebRTC uses:
- GYP
- gtest
- libjpeg_turbo
- yasm and patched-yasm

TEST=Compiled and executed Debug+Release builds of libyuv_unittest on Mac, Linux and Windows.
Review URL: https://webrtc-codereview.appspot.com/758006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@327 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=71
TESTED=xcodebuild -project libyuv_test.xcodeproj -configuration Release
Review URL: https://webrtc-codereview.appspot.com/745006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@326 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=72
TEST=none
Review URL: https://webrtc-codereview.appspot.com/744006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@325 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=70
TEST=none
Review URL: https://webrtc-codereview.appspot.com/710013

git-svn-id: http://libyuv.googlecode.com/svn/trunk@324 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=69
TEST=NONE
Review URL: https://webrtc-codereview.appspot.com/728011

git-svn-id: http://libyuv.googlecode.com/svn/trunk@323 16f28f9a-4ce2-e073-06de-1de4eb20be90

Fix aligned version of SSSE3 alpha blend and re-enable SSE2 alpha blend for performance evaluation on low end CPUs where pshufb is slow.
BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/728009

git-svn-id: http://libyuv.googlecode.com/svn/trunk@322 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/714010

git-svn-id: http://libyuv.googlecode.com/svn/trunk@321 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/714007

git-svn-id: http://libyuv.googlecode.com/svn/trunk@320 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=affine unitest
Review URL: https://webrtc-codereview.appspot.com/729005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@319 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=61,62
TEST=build 64 bit on windows
Review URL: https://webrtc-codereview.appspot.com/717011

git-svn-id: http://libyuv.googlecode.com/svn/trunk@318 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=62
TEST=planar_unittest
Review URL: https://webrtc-codereview.appspot.com/733004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@317 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=62
TEST=none
Review URL: https://webrtc-codereview.appspot.com/716006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@316 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=62
TEST=TestAffine unittest added to planar_test
Review URL: https://webrtc-codereview.appspot.com/731004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@315 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=63
TEST=none
Review URL: https://webrtc-codereview.appspot.com/730004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@314 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=60
TEST=none
Review URL: https://webrtc-codereview.appspot.com/727004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@313 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/709005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@312 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=56
TEST=gentoo builds chromium with libyuv with system jpeg
Review URL: https://webrtc-codereview.appspot.com/699005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@311 16f28f9a-4ce2-e073-06de-1de4eb20be90

NV12ToARGB for linux appears to have a bug in the assembly so this disables the asm for posix.  It still works on Windows.  Unittests updated to show the amount of pixel difference.
BUG=55
TEST=out/Release/libyuv_unittest --gtest_filter=*
Review URL: https://webrtc-codereview.appspot.com/675008

git-svn-id: http://libyuv.googlecode.com/svn/trunk@310 16f28f9a-4ce2-e073-06de-1de4eb20be90

(open TODO: Add unit tests)
Review URL: https://webrtc-codereview.appspot.com/698004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@309 16f28f9a-4ce2-e073-06de-1de4eb20be90

ARGBGrayTo takes source and destination pointers so caller does not need to make a copy of the image.
BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/696004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@308 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=51
TEST=TestARGBColorTable
Review URL: https://webrtc-codereview.appspot.com/667011

git-svn-id: http://libyuv.googlecode.com/svn/trunk@307 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=53
TEST=none
Review URL: https://webrtc-codereview.appspot.com/695004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@306 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/690004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@305 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=51
TESTED=warmify effect
Review URL: https://webrtc-codereview.appspot.com/673013

git-svn-id: http://libyuv.googlecode.com/svn/trunk@304 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=50
TEST=none
Review URL: https://webrtc-codereview.appspot.com/673012

git-svn-id: http://libyuv.googlecode.com/svn/trunk@303 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=49
TEST=untested
Review URL: https://webrtc-codereview.appspot.com/668012

git-svn-id: http://libyuv.googlecode.com/svn/trunk@302 16f28f9a-4ce2-e073-06de-1de4eb20be90

SSE2 version of scale is suspected of having a bug, as it didnt work in ARGBInterpolate, while SSSE3 and C do.  Until the result can be verified, SSE2 is disabled.  This will hurt performance on Pentium4 and below.
BUG=49
TEST=none
Review URL: https://webrtc-codereview.appspot.com/672009

git-svn-id: http://libyuv.googlecode.com/svn/trunk@301 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/670008

git-svn-id: http://libyuv.googlecode.com/svn/trunk@300 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/679009

git-svn-id: http://libyuv.googlecode.com/svn/trunk@299 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/683004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@298 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/673007

git-svn-id: http://libyuv.googlecode.com/svn/trunk@297 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/678006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@296 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/668006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@295 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/674007

git-svn-id: http://libyuv.googlecode.com/svn/trunk@294 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/672006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@293 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/675004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@292 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/652009

git-svn-id: http://libyuv.googlecode.com/svn/trunk@291 16f28f9a-4ce2-e073-06de-1de4eb20be90

UNDER_ALLOCATED_HACK for scale that detects odd width and odd height were miscalculated and adjusts scaler for it.
BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/663007

git-svn-id: http://libyuv.googlecode.com/svn/trunk@290 16f28f9a-4ce2-e073-06de-1de4eb20be90