Fix all compiler warnings

Also fix SwankProtocolConversionsSpec tests on Windows
Merge pull request #485 from edani/warnings

Warnings
Remove IncrementalBuilder and all build related code.
Merge pull request #493 from marcsaegesser/master

Rebuild IncrementalBuilder
fix #466 development server on OS X
use snapshot ensime-sbt
Move to akka actors
Cleanup/seperate protocol
Added basic slf4j/logback config
Merge pull request #499 from fommil/osx_fixes

fix #466 development server on OS X
Merge pull request #497 from rorygraves/akka_actors

Akka Actors, protocol cleanup and logging