Reinstate documentation for new features
Reinstate documentation for new features

This reverts commit a093b91433dbdedfd02827e897cf1f856d16b948.

xuwei-k/xsbt,mdedetrich/sbt,sbt/sbt,mdedetrich/sbt,xuwei-k/xsbt,xuwei-k/xsbt,mdedetrich/sbt,xuwei-k/xsbt,jrudolph/sbt-dependency-graph,sbt/sbt,xuwei-k/xsbt,sbt/sbt,mdedetrich/sbt,sbt/sbt,mdedetrich/sbt,mdedetrich/sbt,sbt/sbt,sbt/sbt,sbt/sbt,mdedetrich/sbt