Numerous Improvements & Tweaks

### Reduce Image File Size ###
Compress Images `PNG` & `GIF` to give overall saving of 13.5kb.

### Improve UI ###
Correct the Box Plugin to integrate better with Bootstrap upgrade, added classes to `select` and appropriate classes to buttons.

### Use one CDN###
Changed all external resources to use one CDN (cdnjs).

### Upgrade respond.js ###
Respond.js is now upgraded to version 1.4.2