Revert "Merge branch 'master' of https://github.com/Activiti/Activiti-Designer into bpmn-2.0-verification"

This reverts commit 836c9bf1f9a26fcd494ce4b9f435c7cf316162a6, reversing
changes made to 874bebf5f8189006bc9e33c6e9a417dbfd829f92.

Conflicts:
	org.activiti.designer.eclipse/src/main/java/org/activiti/designer/eclipse/extension/validation/ValidationResults.java
	org.activiti.designer.eclipse/src/main/java/org/activiti/designer/eclipse/views/validator/ActivitiValidationView.java
	org.activiti.designer.validation.bpmn20/src/main/java/org/activiti/designer/validation/bpmn20/validation/indev/BPVerificator.java
	org.activiti.designer.validation.bpmn20/src/main/java/org/activiti/designer/validation/bpmn20/validation/indev/OfficialRulesValidationWorker.java