The RPC system was not completely satisfactory, we decided to prepare
the future and do it properly. This commit introduces the new rpc
system, which replace the previous new one. We now simply have a
method, this._rpc, which takes a dictionary of parameters. The idea is
that depending on the parameters, it is able to add correct default
value when necessary.
For situations where we don't have the this._rpc method, we can use the
rpc.query method, which takes the same arguments, but directly calls
ajax.rpc instead of triggering up some events.
Géry Debongnie
2106e3dd2e