Issue with minification

[ChrisEdson]

Hey there,

I'm getting an issue when minifying the library - abMfg is not using explicit annotation and cannot be invoked in strict mode.

I've tried using explicit annotation in ab-svc.js, but can't get it going. Any thoughts?

[ChrisEdson]

I managed to fix this through updating ab-test.js to:

.factory('ab', ['abMfg', function (abMfg) {
  return abMfg();
}])

and ab-svc.js to:

this.$get = ['AB', function (AB) {
  return function abMfg(options) {
    options = options || {};
    var abjs = options.ab || AB;

    // quick sanity check
    if (!abjs) {
      throw new Error('ab.js JavaScript library not provided');
    }

    // public API
    return {
      /**
       Runs an a/b test with the variants and frequency provided.
       @method test
       @param {Array} variants to choose from
       @param {Number} frequency float between 0.0001 and 1
       **/
      test: function (variants, frequency) {
        return abjs.test(variants, frequency);
      },

      /**
       Logs data to the given url for processing.
       @method log
       @param {Object} data to send
       @param {String} url to send the data to
       @param {Function} optional callback
       **/
      log: function (data, url, optional) {
        return abjs.log(data, url, optional);
      }
    };
  };
}];

I won't do a pull request as I was unsure how ab-svc is generated - but I'll leave this here for anyone else.