AutoBuffer::allocate(nsz) didn't work properly when
(sz < nsz < fixed_size). In this case sz remained unchanged.

CMake doesn't work with empty paths ("") or paths which contains "./"

change the `while` loop to check if the two windows created by this example still exist, stop the program otherwise

CPack can't work with absolute paths.

opencv_ts is static internal library and in case of exporting
it requires all static dependencies (include HAL files)

Linker dependencies are transitive for non-private

Added python binding for createButton

- removed OpenCV_LIB_DIR* vars (they are broken and not required anymore)
- OpenCVConfig.cmake doesn't contain ANDROID/CUDA code if there is no such support
- removed OpenCV2_INCLUDE_DIRS_CONFIGCMAKE, merged into OpenCV_INCLUDE_DIRS_CONFIGCMAKE
- fix hard-coded relative paths for OpenCV_INSTALL_PATH
- removed OpenCV_TBB_ARCH
- switch OpenCVConfig.cmake into 2-level mode for Android SDK