side by side installs of OpenCV2.3.0 OpenCV2.3.1 OpenCV2.4.x, etc...

cuda support is on by default

renamed OPENCV_SOURCE_DIR to OpenCV_SOURCE_DIR

removed one more OPENCV_BUILD_SHARED_LIB flag

[~] fixed warning in featuers2d under windows (can't generate assignment operator)

[~] Updated GPU module install target to copy NCV.hpp and NPP_staging.hpp to the package include directory

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

removed CMakeLists.txt from gpu/test folder to avoid precompiled header associated warnings under Ubuntu

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

Only for VS2008 now.
Sample for it.
new NPP_staging for VS2008 only

added support of CV_TM_CCORR (via FFT) into gpu::matchTemplate (versions both with block and without blocks)

module reorganization: added folder with pure device functions, cuda_shared.hpp renamed to internal_shared.hpp

Added compilation with NPP to GPU module(FindNPP script). Tested only on win32, but it does not influence on OpenCV compilation if WITH_CUDA flag unset.