fixed ds-graphscan test to make sure that the memory block size is large enough to fit at least the graph header and the sequence block header (ticket 504)

fixed test failure in matrix-dotproduct test (by increasing the desired accuracy threshold) (ticket #447)

the path to "opencv/opencv_extra/testdata" can now be set using OPENCV_TEST_DATA_PATH. Filter pattern can now start with ">" or ">=" symbols, meaning - run all the test, beginning from the particular one - convenient for resuming tests after fixing crashed tests

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