Change aac file format and add file extension to output file

Remove writing to standard input for now

Remove empty conditional for wav format

handle both mp3 and new aac encoding options based on the streamkey
Filter out context'd campaigns when falling back
Remove logging
Fix context-less preroll
First pass at adding Combustion and tests
Add gemspec referenceto Gemfile
Remove db directory
Remove StreamAdmin reference
Reference AudioEncoding module with namespace
Remove unnecessary require
Add combust and rspec tests for public api controller
Remove uneeded route
Add tests for context and consistentPreroll params
Add audio encoding tests
Fix path to test audio file
Update test to be more verbose
Refactor public controller to find an existing campaign based on the params and then send the related audio file
Added method to find the right campaign based on params given and changed the file_for_stream_key method so it creates AudioEncoding subclasses to encode with the proper format based on the key given
Refactor AudioEncoding to have two subclasses where the encoding will happen. Resque task is now fired after_create
This gem enables REGEXP in sqlite3