Configured logging module.

It's currently configured very simply, to log to stderr and at DEBUG level
when the app is in debug mode, and INFO otherwise.

pillar/application/__init__.py

@@ -1,3 +1,4 @@
+import logging
 import os
 import json
 from bson import ObjectId
@@ -91,6 +92,14 @@ app = Eve(settings=settings_path, validator=ValidateCustomFields, auth=NewAuth)
 import config
 app.config.from_object(config.Deployment)
 
+# Configure logging
+logging.basicConfig(
+    level=logging.DEBUG if app.config['DEBUG'] else logging.INFO,
+)
+log = logging.getLogger(__name__)
+log.info('Pillar starting')
+
+
 bugsnag.configure(
   api_key = app.config['BUGSNAG_API_KEY'],
   project_root = "/data/git/pillar/pillar",