Radio: Added Ieee80211 specific transmission class.
Radio: Added TODOs.
Radio: If the carrier frequency doesn't match, reception is not possible.
Radio: Renamed C++ namespace to physicallayer.
Radio: Moved all radio subdirectories directly below physicallayer.
Radio: Renamed common to base and generic to common.

Updated NED package names.
Radio: Removed some completed TODOs.
Radio: Added opMode and preambleMode to transmission.
Radio: Replaced std::cout with EV_DEBUG.
Radio: Removed obsolete XML configurations from dimensional tests.
Radio: Implemented interpolating antenna and cleaned up other models.
Fixed NED imports.
Radio: Followed recent renames with oppfeatures.
Followed NED renames in tests.
Radio: Renamed parameter.
Radio: Replaced Register_Class with Define_Module in path loss modules.
Radio: Fixed path loss instantiation.
Radio: Fixed using EV as a stream.
phy: fixed namespace when built without the RADIO
added inet namespace