Rename settings.py -> settings.example.py

When a new deployment is created, or when new settings are added, we
want to avoid overwriting settings that may already be present. So we
use the settings.example.py file for default settings and settings.py
for deployment settings instead.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

.gitignore

@@ -1,4 +1,5 @@
 ALLOWED_HOSTS
+threadchat/settings.py
 
 ### Django ###
 *.log