Fix smack-experimental experimental.xml resource
Fix ExperimentalInitializer
Add SmackAndOsgiInitializer

OSGi ServiceComponents need the activate method, make sure it exists for
every SmackInitializer by using this class.
Add getDatestamp() to build.gradle
Smack 4.0.1
Smack 4.0.2-SNAPSHOT
Merge branch '4.0'

Conflicts:
	build.gradle
Merge branch 'master' into sasl

Conflicts:
	build.gradle