Added some basic documentation to interfaces.
Changed computation of radio channel limits to be based on radios.
Followed recent changes and added some TODOs.
Radio: copied the new AODV protocol.
Revert "AODV: renamed ModuleAccess parameters and uses getModuleFromPar()"

This reverts commit a06bb42705ed4d8143c50c379c9be6cdb14d8b48.
IdealMac: added support for NF_LINK_BREAK
IdealMac: FIXES: added destructor; lastSentPk and ackTimeoutMsg were not deleted, registered NF_LINK_BREAK signal with type IPv4Datagram.
AODV example: changed omnetpp.ini so that it works with the new Radio.
IPv4Route: added routing info for AODV protocol.
IdealMac: fixed a merge error in commit @7dc6a57f2a42f59.
Radio: added a FIXME.
IRadio: added a NOTE.
Radio: implemented performance simulation for radio mode switching operations.