fix now listen custom events for jb-form method

jsBinder wasn't listening to custom event for form submiting.

I recommand you to increase _patch_ version, let's switch to 2.0.2 ! Oh and, if you accept, don't forget to build new minified version (using [jscompress.com](http://jscompress.com/))

Thanks !

_PS : I only changed line 62 to 65 and line 77, but i had an issue with your tabulations (4 spaces) and the complet file is now updated...._