GROOVY-6512: add priviledged block for the creation of InnerLoader in ProxyGeneratorAdapter
remove @Override for JDK5
GROOVY-4279, GROOVY-4280, GROOVY-4281: allow IDIV and LDIV in safe cases
artifactory plugin applied

Conflicts:
	build.gradle
javadoc tasks are back :)
artifactory plugin only applied if java 6 and up

Conflicts:
	build.gradle