[win32] backport to openmp 2.0
Merge branch 'win32' of https://github.com/andre-schulz/mve into win32
[win32] make umve compilable (OpenGL + C++11)
[win32] Fix potential bug when compiling mve_ogl

- s/link_libraries/target_link_libraries/
[win32] Use CMake's FindOpenMP script