Fixed BUS/BIKE
Added sitter meeting dates to sitter model to add ability to easily lookup when the sitter has dates.
Changed addSitter/parent to addUser, first step towards true generics.
Classmethod should use cls :)
Some less indexing
Changed RPCmodels.py to RPCutils.py
Added modifySitter/Parent
Merge branch 'master' of https://github.com/acepace/dgdsitter
Made signIn/Register transfare data to main screen.

-Added SignIn Exception
-Made ServerInfo Messages Parcelable