updates readme a bit.
adds saving functionality.
some cleanup and bug fixes.
moves shared logic into toolbar_dialog module.
adds the ability to track subviews in the view base.
adjusts how toolbar buttons look when toggled/pressed.
allows buttons / toolbar items to clean up after themselves.
cleans up modal/lightview/panel and makes them more consistent.
fixes bugs and adjusts modal/lightview.
cleans up some specs.
adds the history plugin to the markdown toolbar as a test.
updates the distro.