Level 2 RPC: Define 'Persistent' interface, get rid of 'Save' RPC protocol message.
Gramma fix
Merge pull request #142 from konklone/patch-2

Grammar fix
Working on RealmGateway support, need AnyStruct, gotta merge.
Merge branch 'master' of github.com:kentonv/capnproto
Fix problems with AnyStruct / AnyList change.
Mass-rename capnp::_::FieldSize -> capnp::ElementSize.
More fixes for AnyPointer / AnyList.
Finish implementing RealmGateway -- but needs tests still.