Testing Google Protobuf on App Engine

See import fix and actual project.

To deploy set application ID and version environment variables

export APP_ID="foo"
export APP_VERSION="bar"

and then run

make deploy

Make sure to visit the APIs console at

https://console.developers.google.com/project/<YOUR-PROJECT>/apiui/api

and enable "Google Cloud Datastore API".

In addition, make sure the App Engine Service Account has permissions as a member of your project:

https://console.developers.google.com/project/<YOUR-PROJECT>/permissions

and add the email

<YOUR-PROJECT>@appspot.gserviceaccount.com

Due to the lines

from google.appengine.api.app_identity import get_application_id
...
APP_NAME = get_application_id()
...
if APP_NAME is None:
    DATASET = None
else:
    DATASET = CONNECTION.dataset(APP_NAME)

• Disabling GCE environ check since we know we're on App Engine.
• Using gae-pytz and Updating pytz imports for App Engine.
• Removing dependency on pkg_resources.get_distribution for application version (used in User Agent).