Prepared MediaTransportInitializer in session module for MSRP chat

darcs-hash:20090223141545-58103-353dc2879531b4449fcba6d03f554c0339440bbd
Perliminary integration of MSRP chat into Session

darcs-hash:20090223164359-58103-754ba893a07032843beecee6baa9116c618df855