Replaced 'ev <<' with 'EV <<'.
Replaced 'ev <<' with 'EV_S <<' where this pointer is not available.
Removed obsolete definition for EV.
Replaced envir's ev.getOSStream with cLogStream::globalStream.
Replaced ev.printf with operator<<.
Disabled OMNeT's DEBUG macro to avoid conflicts with AODV's own DEBUG macro.