JBIDE-17748 JBIDE-17749 update angularJS and tern to include new feature versions and ids >> master

Prefer to document WHY things change, not just leave mysteries. Consider these comments, which made it painfully obvious what needed to be fixed in the p2.inf file for JBDS:

https://github.com/jbdevstudio/jbdevstudio-product/blob/master/site/com.jboss.devstudio.core.p2.inf#L16