Merge pull request #20 from DrMarcII/master

Fixes to PageLoader for current dart:mirrors API.
Merge pull request #21 from DrMarcII/master

Update pubspec.yaml.
Update version number to 1.0.0

Improve toString() on WebDriver, WebElement, and By to ease debugging.
Merge pull request #22 from DrMarcII/better_to_strings

Update to 1.0.0