Do not disable "Save" button on registration dialog

- Show validation error messages when the user does not not properly
complete the registration form
- Wording change as per https://github.com/Rise-Vision/common-header/issues/160
- Get rid of authorization modal
- Raise "Create Account" button to the top level
Merge remote-tracking branch 'upstream/master'

Conflicts:
	dist/js/common-header.js
	src/js/controllers/ctr-registration-modal.js
	src/templates.js
	src/templates/auth-buttons-menu.html
	src/templates/auth-buttons.html
Merge pull request #174 from settinghead/master

Do not disable "Save" button on registration dialog