Pdb file support was changed in CMake 2.8.12, support was added in CMake 3.1.0 to work around the problems created by the change introduced in CMake 2.8.12.

 - Resolved GET_ENV and input type incompatibility
 - Made libjpeg compile for WINRT. So does imgcodecs module.
 - Updated .gitignore (log, tlog)

(cherry picked from commit b75cbfde)

Conflicts:

	cmake/OpenCVModule.cmake

Allow to build samples via OpenCV binaries from distribution package
(find_package with OpenCV_DIR).

REVERT OF: Update libjpeg to release 8d (reverse-merged from commit d28af08e)

REVERT OF reverted libjpeg to an earlier version (reverse-merged from commit bfc8a524)

* Fixed zlib search.
* Fixed compiler/linker flags caching bug.
* Fixed OpenCVConfig.cmake generation (currently tested only on Unix).

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

Basically just adding lines at top of CMakeLists that alter behavior if ANDROID is set to
true.

rewrote color conversion functions; added sRGB<->CIE Lab/Luv conversion; added RGB<->YUV conversion; improved [s]RGB->Lab conversion speed

updated 3rd party libs: CLapack 3.1.1.1 => 3.2.1, zlib 1.2.3 => 1.2.5, libpng 1.2.x => 1.4.3, libtiff 3.7.x => 3.9.4. fixed many 64-bit related VS2010 warnings