Simple implementation of PageLoader in Dart.
Change IsDisplayed to WithState.

Remove print statement that was accidentally left in.
Change WithState to use named constructors instead of a parameter.
Split pageloader.dart into separate files.

Addressed some pull request comments.
Remove file accidentally included in previous submission.

Minor style fixes.
Make it an error for non-list fields to have annotations that match multiple elements in the page.
Update error message.
Updated the version number to 0.7.1.

Marked unittest dep as dev dependency.
Add support for implicit List<WebElement> for fields defined as List and
without a ListOf annotation.
Merge branch 'master' into pageloader
Extensive cleanup and improvement to PageLoader:
 - added support for setters
 - added several more tests

Cleanup to webdriver libraries.
Whitespace cleanup.
Merge pull request #3 from DrMarcII/pageloader

Simple implementation of PageLoader in Dart.