Implemented the support of screenshots
Merge pull request #33 from stof/screenshot

Implemented the support of screenshots
Removed the otherMouseEvents tests

This is not needed anymore as the tests have been split into different
methods in the Mink driver testsuite
Implemented evaluateScript

Closes #1
Replaces #31
Fixed the implementation of the getScreenshot method
Merge pull request #35 from stof/evaluate_script

Implemented evaluateScript
Merge pull request #36 from stof/fix_screenshot

Fixed the implementation of the getScreenshot method
Added support for maximizing the window

Closes #15