upgrade ENSIME to 0.1.2
Revert "upgrade ENSIME to 0.1.2"

This reverts commit e38c334903677040fb11f2ee93c693eb482d998d.

oops, 0.1.2 is only available for sbt 0.13
upgrade to sbt 0.13.0 final
Merge branch 'sbt-0.13'
Merge branch 'master' into scala-2.11