Best practice to keep IDE  specific files out of checked in projects
Added gradle wrapper (with gradle version 1.4). Makes the project even more accessible
Merge pull request #23 from rundis/gradle-wrapper

Introducing Gradle wrapper
added server-based integration tests
fixed a test failure (dont use identityRepository)
Merge branch integration-test for #20
Create .travis.yml
added Travis CI status
changed execute() method to return output
changed executeSudo() method to return output
refactoring execute() and executeSudo()
fixed description of execute() and executeSudo()
Merge branch for issue #17
changed version to 0.1.6
Added support for passphrase for private key when using public key auth