Update pluginifier and plugin boilerplate to enable use as AMD modules.

[nevf]

I've wrapped both the pluginifier and boiler plate code in:

// Wrap in a closure to secure $ for jQuery
// Uses AMD or browser globals to create a jQuery plugin.
// It does not try to register in a CommonJS environment since jQuery is not likely to run in those environments.
// See jqueryPluginCommonJs.js for that version. ref: 27/05/2012
(function (factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define(['jquery'], factory);
    } else {
        // Browser globals
        factory(jQuery);
    }
}(function( $ ) {
.....
}));

As per Require.js docs.