Create an adapter for Tern.java

The project and feature with definitions required to adapt JSDT project to Tern.java are created

Signed-off-by: vrubezhny <vrubezhny@exadel.com>
[JBIDE-17161] Include torn.java jsdt adapter into jst
JBIDE-17217 [javascript] Add an adapter for AngularJS-eclipse

The extension point definition is added

Signed-off-by: vrubezhny <vrubezhny@exadel.com>