New test for dynamic validation message

Added a test to catch validation failures by subscribing the isValid
observable.
Revert "New test for dynamic validation message"

This reverts commit 17be1e0ef1bbe2a9addb2e97e1f0c30f45dca57c.
Merge remote-tracking branch 'origin/master'
Added Brazilian localization
Merge pull request #204 from luizbon/master

Added Brazilian localization