clear out TMP_ cmake variable after use, display FFMPEG information after found
the include directory is missing from the installation
add FindsfeMovie.cmake file for developers to use
Merge pull request #28 from firefly2442/FindsfeMovie.cmake

add FindsfeMovie.cmake file for developers to use
Merge pull request #27 from firefly2442/cmake-include-dir

the include directory is missing from the installation
Merge pull request #25 from firefly2442/ffmpeg-cmake-fixes

clear out TMP_ cmake variable after FFMPEG use