Merge pull request #68 from DrMarcII/master

Cleanup of extension and application APIs
move tests to '/test/app' and '/test/ext' so that pub finds them both, and make the libraries 'chrome/app.dart' and 'chrome/ext.dart'

Also:
- cleaned up .gitignore with global rule for 'dart.js',
'dart_interop.js', and 'interop.js'; no need to enumerate these for each
entrypoint.
- CHANGELOG : added not about the addition of the extension API
- README : updated to show the correct import for packaged apps and
extensions
change library declarations to `chrome_app` and `chrome_ext` as proposed in #67
`browser` should be in `dev_dependencies`
Merge pull request #70 from rmsmith/package_layout

move tests to '/test/app' and '/test/ext' so that pub finds them both, a...
README : fixing the size of the headers I added in my last pull request

they should be smaller, not larger, than their parent header :)
hop_runner : fix 'analyze_libs'
Adding identity implementation
Adding stub identity example
adding some documentation
Minor updates to example
complete example
Update example
Merge pull request #65 from financeCoding/identity_example

Identity implementation and  example
Versioning for 0.2.0
Merge pull request #71 from financeCoding/pub-release-0.2.0

Versioning for 0.2.0