Start up RPC server immediately
Start up RPC server immediately

Don't wait for catch-up
Closes #78

Groestlcoin/electrumx-grs,shsmith/electrumx,thelazier/electrumx,Crowndev/electrumx,Crowndev/electrumx,thelazier/electrumx,bauerj/electrumx,shsmith/electrumx,erasmospunk/electrumx,erasmospunk/electrumx,bauerj/electrumx,Groestlcoin/electrumx-grs