Params.printHelp() exits with 0 (instead of -1)
Travis-CI Tests builds JAR and executes it
Add travisci build-image to README
Travis-CI Tests check if no formatting was done
Merge pull request #8 from lummax/travisci_improvements

Travisci improvements
Set type of StringLiteral in ResolveVisitor
Implement (un)boxing of Strings
Test cases for String-constructor
Test cases for String as Object