Remove unaligned functions, since most function support unaligned memory now.  This reduces complexity and improves performance for unaligned cases because C code can be avoided, and overhead is less.  Downside is old cpus (core2 and earlier) will be slower for aligned memory case. Except mips, which has alignment requirement, but remove unaligned variant.
BUG=365
TESTED=unittest builds and passes locally
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/24839004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1113 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=355
TESTED=untested
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/22229004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1067 16f28f9a-4ce2-e073-06de-1de4eb20be90

only enable mips assembly for old 32 bit abi.  new 32 bit abi and 64 bit bit able remove t4 to t7 and add a4 to a7
BUG=337
TESTED=untested
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/20769005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1020 16f28f9a-4ce2-e073-06de-1de4eb20be90

Reduce alignment for loops from 16 bytes to 4 bytes.  Reduces outer loop overhead without hurting innerloop time.
BUG=none
TESTED=try bots
R=fbarchard@chromium.org, mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/4659004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@880 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=untested
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/4509005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@879 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=237
TEST=Scale*
R=ryanpetrie@google.com

Review URL: https://webrtc-codereview.appspot.com/1587004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@710 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=189
TESTED=try
Review URL: https://webrtc-codereview.appspot.com/1113006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@582 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=191
TEST=none
Review URL: https://webrtc-codereview.appspot.com/1127005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@580 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=lint
Review URL: https://webrtc-codereview.appspot.com/1063010

git-svn-id: http://libyuv.googlecode.com/svn/trunk@553 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=lint and try bots
Review URL: https://webrtc-codereview.appspot.com/981004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@514 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/974012

git-svn-id: http://libyuv.googlecode.com/svn/trunk@513 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=133
TEST=still builds
Review URL: https://webrtc-codereview.appspot.com/939020

git-svn-id: http://libyuv.googlecode.com/svn/trunk@491 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TEST=convert_test
Review URL: https://webrtc-codereview.appspot.com/936013

git-svn-id: http://libyuv.googlecode.com/svn/trunk@471 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=126
TESTED=tested by mips
Review URL: https://webrtc-codereview.appspot.com/930005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@449 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=135
TEST=/libyuv_unittest --gtest_filter=*NV*
Review URL: https://webrtc-codereview.appspot.com/939005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@444 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=126
TEST=convert tests NV12 with alignments
Review URL: https://webrtc-codereview.appspot.com/896007

git-svn-id: http://libyuv.googlecode.com/svn/trunk@426 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=126
TEST=lint passes and rotate_test and cpu_test on try bot pass.
Review URL: https://webrtc-codereview.appspot.com/884004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@418 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=126
TEST=rotate_test and cpu_test updated
Review URL: https://webrtc-codereview.appspot.com/879005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@416 16f28f9a-4ce2-e073-06de-1de4eb20be90