In brief, a WHISPER application (whisperApplication) is a
nrtCyclicThread that can manage some WHISPER chains.
Most important providen methods are probably addChain(char *_name),
setCurrentToLast(void) and the message handling methods.
First of all, the application must instanciate a chain, using
addChain(char *_name) and declare it as default chain
(setCurrentToLast(void).
Thus, the addHandler(rtDataHandler *) can be called and any
new handler'll go in the default chain.