add renew and subscribe methods.
add renew and subscribe methods.

Conflicts:
	gateway.py

CryptArc/gateway,darkwallet/gateway,darkwallet/gateway,eXcomm/gateway,jorik041/gateway,eXcomm/gateway,CryptArc/gateway,eXcomm/gateway,jorik041/gateway,darkwallet/gateway,jorik041/gateway,CryptArc/gateway