Ieee80211OFDMModulator: removed a TODO.
ISerializer: included missing BitVector header.
Ieee80211LayeredEncoder: added missing @class and Define_Module.
Ieee80211LayeredEncoder: added signal interleaver module and a note.
OFDMSymbol: got a << operator.
SignalBitModel: BitVector& replaced with BitVector*.
Modulator, Encoder: followed SignalBitModel changes.
Ieee80211OFDMModulator: fixed getSubcarrierIndex().
Ieee80211LayeredEncoder: followed SignalBitModel changes.
Ieee80211OFDMModulator: added Define_Module.
ConvolutionalCoder: implements IFECEncoder.