Impemented utility function to parse SIP URI from the commandline for scripts, only used in sip_audio_session.py for now

darcs-hash:20081208112352-58103-b586f7e363a07db8bda1fdea5e06d195c24d09a9
Added __all__ to pypjua.clients

darcs-hash:20081208112820-58103-b794c9deca3c8ee436965122b1e6e11fe27552d1