Add snapshots repo if a snapshot sbt or scala version is used.
Add snapshots repo if a snapshot sbt or scala version is used.

mdedetrich/sbt,BanzaiMan/sbt-extras,sbt/sbt,sbt/sbt-launcher-package,mdedetrich/sbt,sbt/sbt,xuwei-k/xsbt,sbt/sbt,xuwei-k/xsbt,sbt/sbt-launcher-package,sbt/sbt,xuwei-k/xsbt,mdedetrich/sbt,mdedetrich/sbt,mdedetrich/sbt,schleichardt/sbt-extras,xuwei-k/xsbt,sbt/sbt,mdedetrich/sbt,sbt/sbt,xuwei-k/xsbt,yeghishe/sbt-extras,sbt/sbt,mdedetrich/sbt