Fix #21 - Prevent saving unmodified content
Update README
Fix #22 - Replace removed modules
Fix #23 - Replace new A.Dialog with getWindow

In Alloy 2.0 aui-dialog has been removed. For that reason
we will have to replace all occurrences of A.Dialog with
Liferay.Util.Window.getWindow
Fix #24 - Convert "tabview-list" to "nav nav-tabs"
Add version 0.0.7.1
Increase version to 0.0.7.3