Removed dependency on LoDash

Removed dependency on LoDash for the functions and/or logic:

  * `_.isArray`     => `angular.isArray`
  * `_.isUndefined` => `angular.isUndefined`
  * `_.isEmpty`     => `Array.length`
  * `Array.indexOf` for < IE9
  * `_.any` and `_.contains` with a  `for loop and String.indexOf`
  
  The use of lodash(underscore) is so minimal that there is no major need to include LoDash at all.