do not use WIN64/_WIN64 anymore - CMake did not set it anyway. Use WIN32 + __x86_64 or _M_X64 instead. Also, make VideoInput optional (WITH_VIDEOINPUT=ON/OFF) => now Mingw-dw2 can build OpenCV

added workaround for strange tmpnam() output from VS2010. turned off optimization for DCT & DFT on Win64 for VS200x (VS2010 builds it fine)

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