test(app): add protractor tests for account pages

Changes:
- add protractor tests for auth related pages
- add `onPrepare` and `params` to `protractor.conf.js`
fix(app-signup): switch button classes
fix(app-logout): add blank templates to logout route/state

Closes #570
feat(generator): use sauce labs for running e2e tests with travis CI

closes #572
Merge branch 'feature-sauce' into canary
Merge pull request #573 from kingcody/test/protractor-account-tests

test(app): add protractor tests for account pages
Merge pull request #574 from kingcody/fix/signup-button-classes

fix(app-signup): switch button classes
Merge pull request #575 from kingcody/fix/logout-route

fix(app-logout): add blank templates to logout route/state
add log info for running npm run update-webdriver