subprocesses generation in jpdl + passing variables from/to subprocesses
added support for call activity "calledElement" for external processes and for passing parameters via "activiti:in" and "activiti:out"
added support for call activity "calledElement" for external processes and for passing parameters via "activiti:in" and "activiti:out"
Merge branch 'master' of github.com:mwysocki/signavio-core-mirror

Conflicts:
	platform extensions/bpmn20xmlbasic/src/de/hpi/bpmn2_0/model/extension/activiti/ActivitiIn.java
	platform extensions/bpmn20xmlbasic/src/de/hpi/bpmn2_0/model/extension/activiti/ActivitiOut.java
Merge pull request #30 from mwysocki/master

Support for subprocesses in modeler