Merge pull request #16 from martinthomson/sdp_stub

Creating an implementation of SdpConnection
Stub impl and compile fixes.
Fixing compile errors to SdpAttribute
Merge pull request #18 from adamroach/multistream

Fixing compile errors to SdpAttribute
Merge pull request #17 from docfaraday/multistream_unit_tests

Stub impl and compile fixes.
More stub impl and compile fixes.
Whininess reduction project
Merge pull request #19 from docfaraday/multistream_unit_tests

More stub impl and compile fixes.
A couple of minor build fixes.
Merge pull request #20 from adamroach/multistream

Whininess reduction project
Merge pull request #21 from docfaraday/multistream_unit_tests

A couple of minor build fixes.
Moving enums and init around
Moving to load functions universally
Moving to const refs