ToggleKeywordPlugin 1.0

This plugin toggles the Java keywords public/protected/private and
true/false. Actually, true and false aren't keywords but reserved words.
However, I didn't want to call the plugin ToggleKeywordOrReservedWord or
something like that ;)

This is my first plugin and I hope others will find it useful. Comments, bug
reports and feature requests are always welcome!

This plugin was tested with IntelliJ IDEA 3.0 Build 651 but might work with
other builds.

Thanks to Chris Bartley for creating the ToggleCharacterCase plugin. It
served as a template for this plugin.