cpmpatability

texture channels were not considered correctly, nor was the cuda texture
normalization

Modified sparse pyrlk optical flow to allow input of an image pyramid which thus allows caching of image pyramids on successive calls.
Added unsigned char support for 1, 3, 4 channel images.

- 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>

* use opaque algorithm interfaces
* add stream support

it caused runtime failures

* it is the only place, where it is used
* no need to make this function public

it is generated by CUDA headers and we can't fix it

changed tests for tvl1 optflow
correction of a bug preventing compilation with cuda (fmin changed to fminf)

replaces tabs with spaces

removed legacy tests in cudaoptflow