import dev_settings in settings.py; not the other way

development settings should be imported to settings.py 
development settings differ from one developer to anoteher so they shouldn't be tracked

.gitignore

@@ -14,3 +14,4 @@ main.css.map
 ref.css
 ref.css.map
 .coverage
+crm/dev_settings\.py

crm/dev_settings.py

@@ -1,17 +0,0 @@
-from .settings import *
-
-# Database
-# https://docs.djangoproject.com/en/1.11/ref/settings/#databases
-ALLOWED_HOSTS = ['*']
-
-DEBUG = True
-
-DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.postgresql',
-        'NAME': 'postgres',
-        'USER': 'postgres',
-        'HOST': 'db',
-        'PORT': 5432,
-    }
-}

crm/settings.py

@@ -185,3 +185,8 @@ SG_PWD = os.getenv('SG_PWD', '')
 MANDRILL_API_KEY = os.getenv('MANDRILL_API_KEY', '')
 
 ADMIN_EMAIL = "admin@micropyramid.com"
+
+try:
+    from .dev_settings import *
+except ImportError:
+    pass