Performance: replacing string concat with builders.
Adding default case in switch where missing, printing error message in LAF setup.
Removing redundant null check on iterator.
Workaround for blocking bug in GUI.
Adding missing javadoc.
Tweaking previuous workaround on DMControl.
Removing redundant calls to Math.round
Adding missing javadocs.
Removing (brutal) calls to System.exit()
Adding missing javadoc stubs for methods.
Using utf-8 writer and readers to ensure proper i18n
Making internal AbstractActions private static for performance.
Making serializable classes used by Swing components.
Adding caveats section to README.