added clustering module
added metrics module
changing parent version to 2.3-SNAPSHOT
some tweaks to cluster module, added a configuration and some optmization for message handling / event publishing
reorganized metrics into multiple moduls
removed beans moved to common odule
added some meterics
renameing metrics-core to metrics-base to avoid naming conflict with yammer metrics library
added assembly for cluster module, updated from metrics-core to metrics-base
Integrating cluster module with jdbcconfig:

- broke out config changes into specific events
- added a second more granular synchronizer
updated pom versions to 2.4-SNAPSHOT