Finetune

[EthanReid]

Example scripts to finetune the text and region model.

[forensicmike]

This is fantastic @EthanReid thank you!!

One question, is it a problem that we are not calling model.text.train() somewhere?

2nd, should we possibly be using the config.tokenizer.templates instead of hard-coding? My thought process is that if we want to train on captioning, for example, fine-tuning with the \n\nQuestion:Describe this image.\n\nAnswer: doesn't seem to have much impact on the caption answers.