Deprecated ScalaCodeScanner.tokenize(IDocument, Int, Int) incorrectly handled offset in generated tokens.

Also added a test.

Fixes bug introduced (into master) by SHA: e17b2ae97aaa5644d0cf1ad09ff6bc5ad039002a
Merge pull request #470 from jhaberstro/scala-code-tokenizer-fix

Deprecated ScalaCodeScanner.tokenize(IDocument, Int, Int) incorrectly handled offset in generated tokens.
Updated version of Sbt dependencies

Updated version of Sbt dependencies to 0.13.0-RC3-SNAPSHOT (when building
against Scala 2.10.3-SNAPSHOT), and 0.13.1-SNAPSHOT (when building against
Scala 2.11.0-SNAPSHOT).  The odd version number is due to the fact that we
rebuild Sbt artifacts every night against the latest Scala 2.10.3-SNAPSHOT and
2.11.0-SNAPSHOT, and hence the trailing SNAPSHOT is needed to make Maven happy.
Merge pull request #471 from dotta/transient/update-sbt-version

Updated version of Sbt dependencies