Remove bower dependency no longer necessary because of IE10+ support

Remove bower dependency no longer necessary because of IE10+ support.
The following dependencies are no longer necessary:

• es5shim, all es5 specs are supported in IE10+
  see http://kangax.github.io/compat-table/es5/
• html5shim, all html5 custom elements are supported in IE10+ (except the <main> element, which we currently do not use).
  see http://caniuse.com/#feat=html5semantic
• fastclick, we are not using this dependency in the code at all. Also the delay in tapping vs clicking is gone in current webkit browsers.
• respond, media queries are fully supported in IE10+
  see http://caniuse.com/#feat=css-mediaqueries