Refactored video settings

Ignore-this: 3a49e35070a659cbc92cb83d7815c23c

darcs-hash:20140912114126-56b4d-018d3aff6a8aa1f5afaec937fa7219bf592b38ba
pjsip: don't add crypo lines to SDP if transport is bypassed

Ignore-this: 80feea594f12e287bf0b4484bd8c615d

darcs-hash:20140912115925-56b4d-afb3155e12d5b911996f85f86d9beef7297343fe
Have PJSIP refresh SRTP crypto lines when updating local SDP

Ignore-this: 94976522856b28e5fe1cfd37de12d534

darcs-hash:20140912120115-56b4d-6a089d5896f2ef139f859aee1e27e80093f9204b
Raised core revision

Ignore-this: 5e86cb1efb834febf951d20fcae0dc4c

darcs-hash:20140912120627-56b4d-5613e465abbb7a451c69aa32d184e8a8c9368feb