Minor fixes and changes

Fixed #155 - Option to disable Gravatar - Also got rid of outside elements being loaded such as google fonts.

Fixed - Sidebar hamburger menu transformation

Fixed Custom Error Page url path

Fixed iFrame issue where sometimes when you click a button it would move up 3 pixels.

Updated Font-Awesome to v4.7

Moved Installed Version variable to user.php file

Added default pin on on first setup

Updated language strings

Changed Version History icon to Github