Add codecs in the answer
Merge pull request #95 from nils-ohlmeier/multistream

Basic SCTP support
Merge pull request #96 from ekr/MS_codecs_in_answer

Add codecs in the answer
Export the codec information in the track pairs
Merge pull request #97 from ekr/MS_better_track_pair_descriptions

Export the codec information in the track pairs
Added warning for implementors
Merge pull request #98 from adamroach/sdp

Added warning for implementors
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Merge pull request #108 from martinthomson/sdparta_banner

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added LoadSctpmap function
made serializer compliant with our parser