feat(login by email option): added ability to log in with user primary email. Fixes: RCCE-63

rhodecode/templates/login.mako

@@ -35,12 +35,12 @@
             <%block name="above_login_button" />
             <!-- login -->
             <div class="sign-in-title">
-                <h1>${_('Sign In using username/password')}</h1>
+                <h1>${_('Sign In using credentials')}</h1>
             </div>
             <div class="inner form">
                 ${h.form(request.route_path('login', _query={'came_from': c.came_from}), needs_csrf_token=False)}
 
-                    <label for="username">${_('Username')}:</label>
+                    <label for="username">${_('Username or email address')}:</label>
                     ${h.text('username', class_='focus', value=defaults.get('username'))}
                     %if 'username' in errors:
                     <span class="error-message">${errors.get('username')}</span>