2.3.3

1. Refactored spring contexts to simplify overriding some beans if needed. Now all classpath files called camelot-extensions.xml will be added to the application context, overriding anything that is used by default.
2. Default properties file renamed to camelot-default.properties to avoid conflicts with camelot.properties provided by the user. The latter is loaded after the default to ensure properties overriding.
3. camelot-core.jar file is now runnable. When invoked via java -jar command it will search for camelot.xml across the whole classpath and launch a camelot instance with the specified plugins. No front-end will be initialized.
4. camelot-front module is added. When camelot-front.war is launched in a servlet container it will instantiate a web-front camelot engine, but skip the messages processing module.