Add config.py file to shared.

Multiple apps use the same basic configuration information, so
this seems reasonable.

config.py

@@ -0,0 +1,38 @@
+import logging
+import os
+
+from google.appengine.api import app_identity
+
+
+""" Class for storing specific configuration parameters. """
+class Config(object):
+  # Mutually exclusive flags that specify whether the application is running on
+  # hd-events-hrd, dev_appserver, or local unit tests.
+  is_dev = False
+  is_prod = True
+  is_testing = False;
+
+  def __init__(self):
+    try:
+      # Check if we are running on the local dev server.
+      software = os.environ["SERVER_SOFTWARE"]
+      Config.is_dev = software.startswith("Dev") and "testbed" not in software
+    except KeyError:
+      pass
+
+    try:
+      self.APP_NAME = app_identity.get_application_id()
+    except AttributeError:
+      # We're calling code outside of GAE, so we must be testing.
+      self.APP_NAME = "testbed-test"
+    if self.APP_NAME == "testbed-test":
+      Config.is_testing = True
+
+    Config.is_prod = not (Config.is_dev or Config.is_testing)
+
+    if Config.is_testing:
+      logging.debug("Is testing.")
+    elif Config.is_dev:
+      logging.debug("Is dev server.")
+    else:
+      logging.debug("Is production server.")