[suggestion] directly input vgg.json for training from scratch or finetuning

[seekingdeep]

A good suggestion would be an option to directly input a vgg.json for training from scratch or finetuning
perhaps even add an option to input multiple vgg.json files at once.

--input_json ./input/*.json

[monniert]

I think this feature is less a priority but might be good to have at some point