Fix previous commit

Was untested, is still untested.
scripts/mpv-config: don't add extra options twice

Also, print the configure args, like ffmpeg-config does.
README: make ffmpeg_options and mpv_options usage crystal clear
update README.debian now that trusty is released
increment the debian epoch (the number before : in the version) for git master so that

1:0.3.8

and with --master

2:2014.04.19.0879db9

This ensures that --master is considered "newer"
Merge branch 'master' of https://github.com/mpv-player/mpv-build