Add code coverage and coverall integration

[brunolm]

Coverage

• Add coverage script ng test --watch=false --code-coverage (https://github.com/angular/angular-cli/blob/master/docs/documentation/stories/code-coverage.md)

You can run code coverage and check the result locally:

npm run coverage

And then open index.html in the generated folder coverage

Integration with coveralls:

• Install coveralls npm i -D coveralls (https://github.com/nickmerwin/node-coveralls)
  • Add coveralls script coveralls < ./coverage/lcov.info
• Setup .travis.yml to run coverage + converalls after successfully build
• Create coveralls account, link repo
  • After the build click the badge and copy the markdown code

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Optional stuff

It is possible to run coveralls script locally, but you need to declare two variables: (https://github.com/nickmerwin/node-coveralls)

• COVERALLS_SERVICE_NAME = "Travis"
• COVERALLS_REPO_TOKEN = "coveralls_token"
• npm run converalls

[coveralls]

Changes Unknown when pulling be8c2ea on code-coverage into ** on master**.