Update Bower Task to Use `main-bower-files`

+ `npm install --save-dev main-bower-files`.
+ Update `gulp/tasks/bower.js` to use `main-bower-files`.
+ Update bower task to copy to `build/bower_components` instead of  `build/vendor`.
+ Lock onto specific v0 versions of components to control breakage.
+ Updates `includes.hbs`.
+ Delete `build/vendor`.
+ Add override for jquery to `bower.json`.