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
Intentionally so, getinfo call is still there for people who want to gather that info.  The getinfo_MP call was (in my head anyway) intended to provide a one stop copy/paste shop for us to gather what we needed about the client.- 'CLIENT_VERSION' (currently 90300) gives us all we need to know (can determine protocol/wallet version from client ver if that was needed anyway)