Add Scalac scanning to the Travis CI build

And silence some of the error messages we print so the build log
doesn't go above 4MB (Travis' limit)
Merge pull request #23 from VladUreche/topic/scala-compile

Add Scalac scanning to the Travis CI build
Some small doc changes
Made blacklist in ScannerTest ignore the source path location of the blacklisted file.
Script for running compiler outside sbt