SLING-3499 - adding support for custom annotation per injector (thanks Konrad Windszus for the patch!)

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1600469 13f79535-47bb-0310-9956-ffa450edef68
SLING-3031 - [Tooling] add whitelabel support for slingclipse

Allow overriding the property page to show for Sling projects.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1600470 13f79535-47bb-0310-9956-ffa450edef68