Create bookmarklet

 * Use code from http://psd.github.io/needlet
 * Add page to instruct users how to use the bookmarklet
 * Add link on top bar
Bookmarklet changes:

 * Update bookmarklet javascript to only redirect for Maslow needs
 * Show alert if no Maslow need id found
 * add extra integration assertion to check for an ordered list
Update position and wording of bookmarklet link