upgrade to sbt 0.13.2-RC1
Merge branch 'master' into sbt-0.13.2
use sbt 0.13 syntax
upgrade to sbt 0.13.2-RC3
Merge branch 'master' into sbt-0.13.2

Conflicts:
	webjars.sbt
upgrade to sbt 0.13.2
Merge remote-tracking branch 'origin/master' into sbt-0.13.2
Merge pull request #89 from NetLogo/sbt-0.13.2

upgrade to sbt 0.13.2