* use <copyPaste.canCopyProperty> event to copy category value when copying group
* add camunda-bpmn-moddle for integration tests
BREAKING CHANGES
* CopyPaste: remove <property.clone>, add <moddleCopy.canCopyProperties>, <moddleCopy.canCopyProperty>, <moddleCopy.canSetCopiedProperty>
* BpmnRules: removed <elements.paste> rule in favor of <elements.create> rule
* BpmnRules: removed <element.paste> rule
* ElementFactory: use <attrs.di> property instead of <attrs.colors> for fill and stroke when creating element through ElementFactory#createBpmnElement
* use ES6 import / export
* UTILS: export individual utilities
* TESTS: localize TestHelper includes
BREAKING CHANGE:
* all utilities export independent functions
* library sources got ported to ES6. You must now use
a ES module bundler such as Browserify + babelify or
Webpack to consume this library (or parts of it).