Added check so that build is not FAILED when tests fail.
Modified cache to store byte[]s directly, and only convert to strings at end of execution.
Updated to cache Strings so that cache contents are immutable.
Added default value for grails.work.dir
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/main/java/com/g2one/hudson/grails/GrailsBuilder.java
fixed mock path.
merged from git://github.com/alxndrsn/jenkins-grails-plugin.git.
refactored.
build should be UNSTABLE, if tests failed.
added task note.