update comments
Added new 'Rack' stencil
Merge branch 'master' of https://github.com/jgraph/diagramly-confluence

Conflicts:
	ChangeLog
	pom.xml
	src/main/resources/atlassian-plugin.xml
	src/main/resources/js/DiagramlyBlueprintInit.js
	src/main/resources/js/DiagramlyPageEditor.js
	src/main/resources/js/diagramly.min.js
	src/main/resources/templates/soy/dialogs.soy