use Grails 2.3.7
fix problem ObjectInstantiationException: unable to create HTML parser
- release plugin pulls in old version of nekohtml in transitive dependency to build scope
remove outdated script
update version to 2.0.0 and adjust default plugin excludes
Merge remote-tracking branch 'gpc/master'

Conflicts:
	FunctionalTestGrailsPlugin.groovy
	application.properties