call-method renamed to %call-method, likewise for call-method-with-callbacks

We will be defining syntax forms by the names call-method and call-method-with-callbacks
in a future patch.
call-method: syntax form

Allows specifying the method as a symbol like QApplication::exec, and
builds the smoke method signature by inspecting the arguments.
call-method: implicitly quasiquote args
call-method-with-callbacks: syntax form, similar to call-method
instantiate syntax form

Allows the caller to just pass the class name as a symbol, instead of a
full method signature.