feat(auth) add confirm password to signup and settings

confirm password powered by directive: https://github.com/wongatech/angular-confirm-field
+ adding for attribute to labels and ids to associated elements
+ 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...)