Add RANDR SetScreenConfig GetScreenInfo requests

- Also added ROTATION and CONFIGSTATUS types.
Add GetScreenResources request and MODEFLAG type

- Don't include the length fields in GetScreenResources and SetScreenConfig
  replies as the're redundant.
Add basic RANDR integration test

- Some improvements in test-runner.
Set node version in travis to 0.10

- As the tests were failing due to using setImmediate.
- Remove one log.
Some more test fixes

- Fix error.js test.
- Make sure test_runner exits with the correct error code.
- Comment tests not implemented in core-properties.
Small type and style issues
Remove unnecessary log
Merge pull request #54 from santigimeno/randr_requests

Add RANDR SetScreenConfig GetScreenInfo requests