Optimizing images

The home page was pretty heavy, I reckoned some minification might help, I used this https://www.npmjs.org/package/gulp-imagemin 
Home page size went from 4.7 MB to 2.7 MB ![optimiziation](https://cloud.githubusercontent.com/assets/5094254/5155893/7d6ce416-7295-11e4-848c-a3144054ba27.png)