fix for GRAILS-11417 (should also make ggts "grails tools" --> "add
source jars" work again)
Merge pull request #498 from zyro23/GRAILS-11417

fix for GRAILS-11417
Updated Groovy to 2.3.1
correctly propagate isInteractive system property
Merge branch '2.3.x' into 2.4.x
calculate interactive system property independently of GrailsConsole
update POMs to use 'grails-dependencies', fixed version of maven-plugin (since it doesn't need a new release per Grails release)
update hibernate plugin version
Merge branch '2.4.x'

Conflicts:
	grails-bootstrap/src/main/groovy/org/codehaus/groovy/grails/cli/GrailsScriptRunner.java