wip: change groupId to org.rundeck
wip: add javadoc and sources archives to core
Enable sonatype uploads/jar signing
Add make targets for core release/snapshot

update gradle file
Merge commit 'v1.4.5' into publish-1.4.5

Conflicts:
	core/pom.xml
	plugins/script-plugin/pom.xml
	plugins/stub-plugin/pom.xml
	rundeck-launcher/launcher/pom.xml