Special handling of the RTCP reporting interval for video sessions.

git-svn-id: http://svn.code.sf.net/p/fmj/code/fmj@78 799b4810-d841-4bb4-a54b-9156a0c3e4cd
Provides a way to update the (global) transmission statistics maintained by the RTCPTranmitter.

git-svn-id: http://svn.code.sf.net/p/fmj/code/fmj@79 799b4810-d841-4bb4-a54b-9156a0c3e4cd