Merge pull request #54 from popcornmix/master

Disable MJPG as it stops mp3 files with album art from playing
fixed AAC channel mapping
sync with xbmc omx core
Removing alang to avoid confusions
Add key bindings
Fix key binding format at README
Fix key binding format at README, again.
Last fix for README.md I hope...
Merge pull request #57 from skgsergio/add_keys_to_readme

Add key bindings
Adjust volume prior to downmixing
Allow deinterlace on high resolution videos. Latest firmware will cope
Merge pull request #58 from torarin/downmix

Apply volume to downmixing coefficients instead of audio_render
Merge pull request #56 from skgsergio/remove_alang

Removing alang to avoid confusions
Add boost-on-downmix flag.
Merge pull request #62 from torarin/boost_on_downmix

Fix passthrough breakage and add boost-on-downmix flag.
Disable PNG as it stops mp3 files with album art from playing
Allow rtsp urls. See #67
Update OMXReader.cpp

Update OMXReader.cpp to get file length (duration) when omxplayer starts reading the file.
Merge pull request #70 from XavM/master

A small update to OMXReader.cpp to get file length (duration) into the output when omxplayer starts reading the file.
Support mmsh, mmst, mmsu protocols