ffmpeg dshow: Fix packet life preserver in video_decoder and revert move of packet pop.
chroma feature:  MIXER 1-1 CHROMA GREEN|BLUE 0.10 0.04
changed term prenumeration to subscription in OSC implementation
Removed unnecessary exception throwing for absent template-hosts element in config file.
Fixed problem in audio_mixer where a default constructed channel_layout was used. Also fixed so that default constructed channel_layout and mix_config instances doesn't have uninitialized members
Merge pull request #136 from cambell-prince/master_chroma

chroma feature:  MIXER 1-1 CHROMA GREEN|BLUE 0.10 0.04
Merge branch 'master' of https://github.com/CasparCG/Server
Statically link against SFML instead of dynamically

#117
Changed copyright header in all files, and added it in some files where it was missing.

#132
Merge pull request #134 from cambell-prince/master_dshow

ffmpeg dshow: Fix packet life preserver in video_decoder
Merge branch 'master' of https://github.com/CasparCG/Server
Merge remote-tracking branch 'origin/master' into ffmpeg-update