Use latest snaps of restlet bridge and security.
Update excludes and sort out muck for restlight hack.
Remove sisu-plugin (plugin-api and plugin-host-api, pending model-api once nexus-plugin-bundle is used)
And move @ExtensionPoint and @Managed into nexus-compat and deprecate them.
Merge branch 'master' into sisu-plugin-intf-to-compat

Conflicts:
	nexus-core/pom.xml
	pom.xml
Merge pull request #720 from sonatype/sisu-plugin-intf-to-compat

Kill sisu-plugin (mostly)