Flexslider, additional folders, cleanup

• Added Flexslider
- put minified jquery in plugins.js
- documentation in docs folder
- created Sass-ified version of flexslider.css, compiles to flexslider.css

• Added fonts folder
- added template path to fonts folder in htaccess.php

• Added i folder in css folder (just in case you're still into that)

• Clarified language in config.php about how to specify which pages do not have sidebars