renggli/PetitParserJava — pull request #2 by eitch (2014-07-15 16:37:13+00:00)
Title: Mavenization and NPE fix

I've added a pom.xml so that PetitParserJava can easily be built using Maven.

Further i found an irritating NPE which occurs when one tries to define and action for an non-existing definition. I simply used the same error for when re-defining.