Update language to the servo master's rust.

 * Update rust-bindgen which compiles with the rust version.
 * Some syntax update.
Revert "Update language to the servo master's rust."

This reverts commit 69aaf0ac190cae40b4de24c5b564154b8c0e7109.
Merge branch 'master' into bindgen
Add wx constants def.rs that is partly auto-generated.

 * Partly auto-generated by rust-bindgen and wx/defs.h.
  * Using global static symbols only by grepping "^public static ".
 * Convert manually some constants which are #defines which isn't handled by rust-bindgen.
 * Rewrite test.rs to use defs.rs constants.
Merge pull request #11 from kenz-gelsoft/bindgen

Generate wx constants definitions from wx/defs.h