Renamed library to SDK

darcs-hash:20090907163801-58252-ce8511c7d671a8a53198cb994cd973e20c963d94
Fixed handling of MediaStreamDidEnd in Session

Ignore-this: a915fc2aaf89434119906405e621773c

darcs-hash:20090907174452-1e3d8-ff1c4b50b5d84a5c6262a21d3e3768eb1b363a24