Updates to be compatible with Scala IDE master

Name of the junit bundle has changed
Export scalat-finders jar to be visible in the test project
Bump weaving hook version.
Cleans up unused variables & imports

Also removes some minor deprecations & syntax linting.
Hard coded changes to build against Scala IDE master
Adapt to new ScalaPlugin / ScalaPresentationCompiler API in scala-ide
Merge branch 'ScalaAPI' of git://github.com/huitseeker/scalatest-eclipse-plugin into kepler-nightly-2.11

Conflicts:
	org.scala-ide.sdt.scalatest/src/scala/tools/eclipse/scalatest/launching/ScalaTestFinder.scala
	org.scala-ide.sdt.scalatest/src/scala/tools/eclipse/scalatest/launching/ScalaTestLaunchShortcut.scala