Use ``` for examples - fixes https://github.com/dart-lang/stagehand/issues/577
Drop package name - fixes https://github.com/dart-lang/stagehand/issues/576

Fixes #571.

Require Dart 2 stable
web-angular: use stable dependencies

Fixes #568

Also:

* Update version to 3.1.1
* Temporary disable Travis job that uses dart_coveralls

Contributes to #561.

This will replace https://github.com/dart-lang/stagehand/wiki/Contributing.

Fixes #547

fixes https://github.com/dart-lang/stagehand/issues/550

Dart 2 does not create a .pub directory
`build/` is not created by pub – move it to a new section

Fixes #542

Closes #538

Fixes #530
Fixes #535

This reverts commit 11e60b97.
This reverts commit 2df53280.

Will revisit when github.com/google/pageloader/issues/145 is fixed

Fixes https://github.com/dart-lang/stagehand/issues/526

* web-angular: unpin sass package

Also have analyzer ignore .dart_tool and build folder contents.

Closes #524

* Updates based on Kevin's feedback

* Upgrade min SDK and web-angular

Fixes #506, #521, #522

* web-angular: add link to testing docs

Fixes #519

* web-angular: reintroduce page object class based on pageloader 3

Fixes #517

* Commit *_po.g.dart file

Fixes https://github.com/dart-lang/stagehand/issues/513

Fixes https://github.com/dart-lang/stagehand/issues/508