feat(auth) add confirm password to signup and settings

confirm password powered by directive: https://github.com/wongatech/angular-confirm-field
also adding for attribute to labels and ids to associated elements
also fixing invalid password error in settings HTML to ref pwd.old. instead of form.password...
  (Jade was ok)

take note of new dependency in test/fixtures/bower.json (re-run bower install on current clones...)