Merge pull request #15 from NiteshKant/master

Fix for issues #9 #10 #11 #12
Gradle Release Plugin - pre tag commit:  'karyon-1.0.4'.
Gradle Release Plugin - new version commit:  'karyon-1.0.5-SNAPSHOT'.
Added google group details
Fixes issue #17 #18

Issue 17: Provided an interceptor concept for pre-defined phases in karyon's initialization. Archaius integration is modelled as an interceptor  now and can also be disabled.
Issue 18: Provided a ServiceRegistryClient interface to abstract away the service registry interaction.