fixed HaarCascadeLoader test (incorrect behavior due to macros usage)

[*] Fixed two bugs in reduction functor: out of shared memory bounds access and missing volatile on GF100 and further

[~] NCVPyramid uses tr1 and thus can be compiled with CL, commented out on linux
[+] Moved reduction functors to NCVAlg
[*] Warnings in NCV

[+] Color conversions stub via pixel types
[+] Pyramid calculation (required for mipmaps in CUDA 4.1)
[~] Changed C strings to C++ throughout NCV
[~] Fixed a couple of bugs in NCV

optical flow gpu cosmetics

[+] Added 128-bit transpose

[*] Fixed #974 ("GPU CascadeClassifier fails with some training files"): Moved IsNodeLeaf bit from NodeDescriptor to FeatureDescriptor for both left and right nodes, therefore from now on max number of rects in a feature is 31

*fixed some warnings
*finished gpu test port to gtest framework

2) NVidia tests for GPU
3) FD sample that uses NVidia's interface.