Version bump to 0.2.2
Fix typo
Tidy up plugin.xml and SplashHandler.java (still doesn’t work, though)
Fix parser bug where NPEs were thrown if ‘actions’ or ‘operations’
blocks were empty, and in the process, refactor out the ‘plural’
definitions (AActionsDefintion, ATypesDefinition, AValuesDefinition, and
so on).