Added rotate right/left buttons to default tools
Fixed code style issue.
Updated images for rotate left/right to better match existing buttons.
Added configuration around the rotate left/right buttons. The default for showRotationControls is false to preserve existing functionality. Also added default tooltip strings for the buttons.

This version runts the tests fine locally using 'npm test'. It looks like the remote build was having a timeout issue which I couldn't reproduce.
Tuned the configuration around the rotate left/right to work when the drawer is instantiated.
Added tests for rotate control on/off setting.
Fixed message context to be more correct. I believe the message is only displayed when a failure occurs, so it needs to be clear what was being tested.
Added simulated left/right rotate clicks to the test case.
Merge pull request #341 from fs-webdev/rotate-buttons

Added Rotate Left/Right buttons to standard controls