Feature/replication status updater

### Team review and suggestions welcome.

**Replication Status Updater (Activate/Deactivate/Clear) with Package Activation event handler.**

`ReplicationStatusManager` service used to update Replication state of resources. Only resources whose nodeTypes are of the osgi configured `node-types` are candidates
   * `node-types` defaults to: `cq:ReplicationStatus, rep:User, rep:Group`
   * Open call for other default node types

`JcrPackageReplicationStatusEventHandlerImpl` event handler that listens for replication events on JcrPackage resources. 
 * Currently get the package contents via package "coverage" (though I think this is different than "contents" which is what is preferable; need to investigate this some more).
* OSGi configurable: `replicatedBy` name

### Pending 
* Unit tests
* ~~Verification of Coverage vs Contents~~