Ieee80211Modulation, ModulationType: changed copyright header.
Ieee80211OFDMDemodulator: module class and the module have been separated.
Ieee80211LayeredDecoder: module and the decoder have been separated.
ReceptionPacketModel: added serializedPacket member.
LayeredReceiver: added LevelOfDetial, headerDecoder, headerDemodulator.
Ieee80211LayeredEncoder: added support for compliant and non-compliant modes.
Ieee80211LayeredReceiver: added support for compliant and non-compliant modes.
LayeredDecoder: added support for compliant and non-compliant modes.
IReceptionPacketModel: added getSerializedPacket().
PHY/Layered: added TODOs, followed changes.