feature(mp4boxTmp): adding a flag to set a mp4box tmp folder
feature(mp4boxTmp): adding a flag to set a mp4box tmp folder

Useful for me when running mkvtomp4 from applescipt which has some sort of issue with the tmp folder. Seemingly related to this http://sourceforge.net/p/gpac/bugs/242/

mshick/mkvtomp4