Added documentation for variable mode. If you would like to update your version of the Rounded GUI Kit to use it, here are the steps:
- Download the latest version.
 - Replace 
gallery.rpyin your files with the latest one. - Delete 
gallery.rpycin your files. - Add the following line to 
kit_options.rpy 
define gallery.variable_mode = False
You're done! If you'd like to utilize the new variable mode, go over to to the gallery documentation to learn how.
