Simplified ICE related properties in SDP objects

Ignore-this: afdc0ff78d53e5fc95adc6f6e380cfa9

darcs-hash:20100526182126-1e3d8-3cf8ba6001a5376b522342c68624667191b5c1a5
Remove MSRP failure and success report settings

Ignore-this: 3035e9881f55d03f57bfc687f9b4a368

Values are now fixed:
  - chat: success report yes, failure report yes
  - is-composing indication: success report no, failure report partial
  - file transfer: success report yes, failure report yes
  - desktop sharing: success report no, failure report partial

darcs-hash:20100527123511-56b4d-d505951fa923a18b2575232f75fc063ae8a4fc7d