File wide scope [Enhancement]

[corynezin]

Any thoughts on the possibility of adding a file-wide scope to a gin config? I am thinking about the case where one may want to instantiate many instances of the same model with different parameters each time. I could through every file and prepend model_001/ then model_002/, etc. everywhere but I feel there could be a better way. Or maybe add the option to parse with a given scope, e.g. gin.parse_config_file('config.gin', scope='model_001'). Or extend the include syntax as follows: include 'path/to/another/file.gin' with scope model_001