Add links to wxWidgets API reference into generated API doc.
Rename traits names: TFoo -> FooMethods.

 * As a more natural naming.
Rename remainder wx prefixes.
Rename generated classes: C* -> Rust*.

 * Rename both of following names into Rust* classes.
  * ELJ*
  * wxc*
Merge branch 'rust-servo' into rust-0.8: Rename more names and added links into API doc.