refactor(rating): add helpers to access stars in tests
fix(rating): evaluate `max` attribute on parent scope
chore(build): activate multiple browsers on Jenkins-CI

Closes #595
test(typeahead): re-organize tests
fix(typeahead): play nicelly with existing formatters
fix(typeahead): properly render initial input value

Closes #591
fix(typeahead): separate text field rendering and drop down rendering

Closes #240
Closes #274
test(typeahead): activate all tests
fix(datepicker): handle correctly `min`/`max` when cleared