added silence trimming for beginning and end
added lastCommercialBlockAired to stations table
CommercialBlockFactoriesWorking
Added trim_silences to audio_converter
Got silence-trimmer installed and working
Adjusted CommercialBlockFactory to include current_position
changed estimated_airtime to airtime
Fixed mute button
Added GetProgramForBroadcast and got it working with all tests
Fixed mute bug
get_program_for_broadcast usecase bugs fixed
Lots of Rails Cleanup
Cleaned up listens_show.js. Commercials Working