update launch_europa
add do_git_pull
more comments in mixer
rename prototypes
mixer_crossfade works most of the times
add using_libcheese prototype
add gst-mixer.sh prototype
add ramp.py
Merge branch 'europa'
fix to cues.json: rose_souffle_slow2_cut.mov
Merge branch 'europa'
another fix to cues.json
print warning if any video file not found
Merge branch 'master' into crossfade
avoid public attributes
made some attributes privates
rename a var
Use filesrc and decodebin
towards playing two clips
It fades in

Still a bug when the files are over, though, I think.