Enhancmenets to ActivitiEndpoint

* Add excludeVariables and includeVariables : for filtering header and property fields
* Add copyOnlyFromSerializable : when set only serializable will be copied from headers, map body or properties

Conflicts:
	modules/activiti-camel/src/main/java/org/activiti/camel/ExchangeUtils.java
updated version numbers
Enhancmenets to ActivitiEndpoint

* Fix variable name
* Fix setting includeVariables and excludeVariables from String