Basic implementation for a policy wrapper.

The implementation here is meant to wrap a library of JSON policy
documents. Policies should be added to directories corresponding to
where they will be defined (portfolio, application, environment).
Functionality for parsing portfolio policy definitions is included. When
the policies need to be defined on a management group, the
AzureCloudProvider can iterate the appropriate tier of the policy
manager and add those definitions.

config/base.ini

@@ -3,6 +3,7 @@ ASSETS_URL
 AZURE_ACCOUNT_NAME
 AZURE_STORAGE_KEY
 AZURE_TO_BUCKET_NAME
+AZURE_POLICY_LOCATION=policies
 BLOB_STORAGE_URL=http://localhost:8000/
 CAC_URL = http://localhost:8000/login-redirect
 CA_CHAIN = ssl/server-certs/ca-chain.pem