Added SECRET_KEY generation and saving to config file

Issue #141
get_random_string defined if unable to import

Issue #141
django.utils.crypto.get_random_string is not available in django 1.3 so
we have to define it locally if it doesn't import.
Change email address to opensource@ok.is
Include information from notes and notes_url fields when adding a service
Update README.md
Merge branch 'master' into secretkey
Merge commit '5a952e2'
Merge commit 'a2bd0cb'
Merge commit 'ad63999'
Merge branch 'secretkey'