Another huge batch of registry v2 changes

Add patch support and resumeable sha
Implement all actual registry methods
Add a simple database generation option

app.py

@@ -43,10 +43,10 @@ CONFIG_PROVIDER = FileConfigProvider(OVERRIDE_CONFIG_DIRECTORY, 'config.yaml', '
 app = Flask(__name__)
 logger = logging.getLogger(__name__)
 
+
 class RegexConverter(BaseConverter):
   def __init__(self, url_map, *items):
     super(RegexConverter, self).__init__(url_map)
-    logger.debug('Installing regex converter with regex: %s', items[0])
     self.regex = items[0]