Custom menus and custom properties for loading menu images. (WIP)
Removed unnecessary .htaccess. Changed image_filename attribute by image_url.
Refactored into different files.

Removed comments.
Removed icons.

Related to #10.
Updated readme about custom menu configuration.
Fixed embed height size.

Removed jqDock references if menu is not used.
Removed JavaScript usage if menu is not used.

Relates to #10.
Updated readme for menu not supporting subitems. Relates to #10.