scala 2.11.4.
Merge commit 'refs/pull/89/head'
Fix per-version sbt plugin from .sbt support for 0.13.*
0.13.7-RC2 for -sbt-dev.
Merge commit 'refs/pull/90/head'
Test updates.
Revert "Fix per-version sbt plugin from .sbt support for 0.13.*"

This reverts commit 3ed8563a3f2bccb5ecffc4d24712cb8e1b12aa7d.
Unchange that test.