Rename .sl file to .sl.lib since .sl extension wrongly oppucpies github code percentage
use sbt-0.13.2-M1
Fix warnings
Merge pull request #50 from xerial/feature/sbt-0.13.2

Feature/sbt 0.13.2
Fix class name search to look up URL entries registered in parent class loaders
Merge develop
CallGraph is now a standard class
Add List files/dir operation impl
Store command execution result to a file
Add Sink type to store intermediate results