Update to sbt 0.13.6
Change to only depending on robovm-dist-compiler
Change organization to org.roboscala
Update README
Fix formatting issues in README.md
Typos and grammar
Update link to roboscala samples
Fix roboscala-samples url
Update README with LLVM bug
Fix docs for listing custom simulators
Add better note about LLVM bug
Link the RoboVM issue for the LLVM bug
Typos in README
Add contributors file