Improve automatic emails with temporary urls

This MR targets the improvement for automatic emails concerning validation of new users by supervisors/re-validation of users.

Fixes #542 (closed)

Fixes #550 (closed)

beat/web/accounts/urls.py

@@ -30,5 +30,5 @@ from . import views
 
 urlpatterns = [
     url(r'^settings/$', views.account_settings, name='settings'),
-    url(r'^temp/(?P<hash_url>\w+)/$', views.load_temporary_url, name="temp_url"),
+    url(r'^validation/(?P<hash_url>\w+)/$', views.load_temporary_url, name="temp_url_validation"),
 ]