0.35.0

• Improved PrimaryKey deprecation warning (courtesy @tonybaloney).
• Added piccolo schema generate which creates a Piccolo schema from an existing database.
• Added piccolo tester run which is a wrapper around pytest, and temporarily sets PICCOLO_CONF, so a test database is used.
• Added the get convenience method (courtesy @aminalaee). It returns the first matching record, or None if there's no match. For example:

manager = await Manager.objects().get(Manager.name == 'Guido').run()

# This is equivalent to:
manager = await Manager.objects().where(Manager.name == 'Guido').first().run()