Updates to be compatible with Scala IDE master

Update to latest version of plugin-profiles to use Scala 2.11.1
A helper method was removed
Reopens project in test, to avoid ordering problem
Merge pull request #90 from skyluc/issue/sync-scala-ide-master

Updates to be compatible with Scala IDE master
Removes dead code as a prereq for API work

Unused imports and members, some deprecations.
Shout if you see anything controversial.
Merge pull request #91 from huitseeker/issue/API

Removes dead code as a prereq for API work
Cleanup obsolete bug workaround introduced for Scala 2.10.
Merge pull request #92 from huitseeker/SI-8205-cleanup

Cleanup obsolete bug workaround introduced for Scala 2.10.
Adapt to new ScalaPlugin APIs
Update default build profiles