better jdk resolution, workaround https://github.com/typelevel/scala/issues/75
MELPA shield
Merge pull request #667 from fommil/jdkDir

consistent use of JDK directory (and tools.jar)
Config option to pass arguments to debugger VM
Merge pull request #676 from edani/debug-218

Config option to pass arguments to debugger VM
bump sbt and use resolution caching
create parboiled helper method, refactor descriptorparser
remove dead code close #678
Merge pull request #679 from fommil/fix_invalidate_classpath

Fix invalidate classpath