Merge pull request #62 from martinthomson/sdpwrap

Creating AddCodec wrapper
Merge pull request #63 from martinthomson/sdpwrap

Making it not print a 1
Merge pull request #64 from martinthomson/sdpwrap

Making it not wacky
Added
Checkpoint
Have a list of codecs that get automatically added
unbitrot
Merge pull request #65 from ekr/MS_less_hardcoded_codecs

Ms less hardcoded codecs
Added definitions for video codecs
Merge pull request #66 from ekr/MS_support_video_codecs

Added definitions for video codecs
Record m line assignments
Merge pull request #67 from ekr/MS_set_local

Record m line assignments
Using AtSessionLevel more
Moving to name inference for attributes