Added xml file to add properties to the UI. This doesn't do anything yet.
Added the custom types that display when creating a new piece of content.
Added aspects and subtypes that can be applied to rules and types for specialising content.
Added a title for the Related Document aspect - it being missing caused exceptions when listing all of the aspects (to select one to apply)
Merge branch 'master' of https://github.com/stuartleyland/AlfrescoLearning into ui-customisation

Conflicts:
	secondproject-alfresco/src/main/resources/alfresco/module/secondproject/model/content-model.xml