HAL extensions: added initial version of universal intrinsics (C implementation and SSE2, NEON - TBD). added empty files where some functionality from core and imgproc will be moved to

2. Algorithm::load/save added (moved from StatModel)
3. copyrights updated; added copyright/licensing info for ffmpeg
4. some warnings from Xcode 6.x are fixed

Small error - object fs does not exist in this code example

Moved out of TLS to properly collect data from different threads;
Concurrent access guards were added to collection functions;

... before any exceptions occur.

(cherry picked from commit 08da247a)

(cherry picked from commit 16ce114e)

- note: uses VFPv3 instructions
- also added overloaded cvRound variants with float and int parameters
- thanks to Marina Kolpakova from Itseez for idea
- thanks to developers from #llvm IRC channel for help with inline asm

explained reason why IPP is disabled on 32-bit Linux. disable IPP's minMaxLoc_32f on 32-bit OSes only

2) disable IPP on 32-bit Linux when OpenCV is built as shared libs. Otherwise we get linker errors
3) disable IPP's minMaxIdx 32-bit floating-point flavor in a hope that it fixes some test failures

 - explicitly turning OCL off since WinRT does not support it
 - fixing macro definitions in core/ocl.cpp
Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

- Substituted HAVE_WINRT with WINRT
- Fixed compilation issues in ocl.cpp and parallel.cpp
- Fixed compiler issue for WP8: "C2678: binary '+' : no operator found which takes a left-hand - Fixed gitignore
- Added #ifdef HAVE_OPENCL to remove compiler warnings in ocl.cpp
- Used NO_GETENV similar to '3rdparty\libjpeg\jmemmgr.c;
- Added ole32.lib for core module (for WindowsStore 8.0 builds)
- Made OpenCV_ARCH aware of ARM
Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>