Merge pull request #1 from hsn10/sbt

build with SBT
Merge pull request #2 from hsn10/sbt

do not do scala/java mixed compilation. Use javac to compile java source...
Merge branch 'master' into nojava
remove scala version suffix from artefact
remove scalatest, since its unused
do not put scala libraries to dependencies, we are not using them, its just java