Add alerting and getinfo_MP

Please see notes here guys http://pastie.org/pastes/9733526/text?key=luz9fdv1whtvfhn1sjvckg

Before merging can we grab an hour to build this and run over how it works/test it out.

Thanks
Z
If it's only one, then that's perfect. Right now it's still there: https://github.com/zathras-crypto/mastercore/blob/0.0.9-Z-Alerts/src/rpcmisc.cpp#L63 (also in mscore-0.0.9).