Rename functions.py to functions.py.default

Since this is default settings and the user might want to customize
them, functions.py has been renamed. This also will prevent conflicts if
the user has updated their functions.py and then tries to pull.

.gitignore

@@ -133,4 +133,5 @@ uploadkeys
 savelog.log
 uwsgi.log
 settings.py
-secret.key
+functions.py
+secret.key