PatternOptionHandler plus unit test and error strings
Merge branch 'master' of https://github.com/kohsuke/args4j into pattern

Conflicts:
	args4j/src/org/kohsuke/args4j/spi/Messages.java
	args4j/src/org/kohsuke/args4j/spi/Messages.properties
	args4j/src/org/kohsuke/args4j/spi/Messages_de.properties
Fixed meta var name thanks to user javaerb :)
Merge pull request #59

Conflicts:
	args4j/src/org/kohsuke/args4j/CmdLineParser.java