Added new documentation and a new function.

Added a new function to AisisCore_Templates_Helper_Loop called Sidebar()
which take sin the name of the option, the key of that option and array or a string pof pages. This will be used instead of get_sidebar(). By default if nothing is set or things do not match up we will call get_sidebar()

All themes now require the use of Header, Footer and Sidebar php files from Wordpress. Which I think is ridiculous. Also need a comments.php.