Resolve "Login page links do not work"

Closes #368 (closed)

It solves the issue, but I think there should be better way to provide context only to the login page.

smash/smash/context_processors.py

 from web.models import ConfigurationItem
-from web.models.constants import LOGIN_PAGE_BACKGROUND_IMAGE
+from web.models.constants import LOGIN_PAGE_BACKGROUND_IMAGE, DEFAULT_FROM_EMAIL
 
 
 # noinspection PyUnusedLocal
@@ -8,5 +8,6 @@ def login_background(request):
     Context processor - these values will be available to templates once registered in settings.py
     """
     return {
-        'login_page_background': ConfigurationItem.objects.get(type=LOGIN_PAGE_BACKGROUND_IMAGE).value
+        'login_page_background': ConfigurationItem.objects.get(type=LOGIN_PAGE_BACKGROUND_IMAGE).value,
+        'email': ConfigurationItem.objects.get(type=DEFAULT_FROM_EMAIL).value
     }