added empty app for notifications

Conflicts:
	main/settings.py
Added first notification version.

Conflicts:
	main/settings.py
Removed (now changed) password

Conflicts:
	main/settings.py
Correct parsing of URL’s in text & variable email subject generation
Added note return object. Enables use in e.g. awards.py
added possibility to enable email notifications
Added moderator activity email subject
Corrected parsing of /p/ and /u/. Should be robust enough.
reverted changes to settings.py

Conflicts:
	main/settings.py
Merge branch 'neurostars.org-develop-emailnotify' into neurostars.org-develop
Added local settings and static content for local copy
no message
Fixed some errors
Merge branch 'local_copy' of https://github.com/flinz/biostar-central into local_copy