Added AMD support

[romansk]

No description provided.

[aterrien]

Thank you Roman,

What do you think to let jQuery do it ? It seems that jQuery supports AMD since 1.7 :

if ( typeof define === "function" && define.amd && define.amd.jQuery ) {
    define( "jquery", [], function () { return jQuery; } );
}

[fidothe]

Unfortunately plugins need to support AMD as well. I've added a much cleaner version of this PR in #202, which only adds the UMD boilerplate and doesn't alter the rest of the code at all.

[aterrien]

#202 was merged, thanks @fidothe.