use scala version from Dependencies
remove scalaVersion from BuildSettings
explicit dependenncy on scala-reflect

Mostly just to keep the version of scala-reflect
the same as scala-library.
Merge pull request #39 from brharrington/scala-version

use scala version from Dependencies
Merge remote-tracking branch 'nflx/master' into scala-2.11.5

Conflicts:
	project/BuildSettings.scala