adding #requiresLib function to modules
use it like that:
module('foo')
.requires('bar')
.requiresLib({
    url: 'http://some/lib.js'
    loadTest: function() { return typeof someLib !== undefined; }
})
.toRun(function() {
  // code that depends on module('bar')
  // and http://some/lib.js
})
using #requireLib for apps.Handlerbars
Merge pull request #101 from LivelyKernel/modules-can-require-external-libs

Modules can require external libs