Prepare a script to convert results of different models to the unified format

[dchaplinsky]

As it was discussed previously, our current idea is to train different models and then made an ensemble model which will be used to pre-annotate new texts (which will be proofread by the editor later) to expand the corpus even more.

To implement that we need a CLI python script which will convert results of different models back to BRAT format. Next stage is merging :)

[gawy]

For model evaluation purposes results were converted to IOB format so it might be easier to use IOB as a universal format.
@dchaplinsky what do you think
Except for merging model results what intended usages do you foresee?

the only downside of IOB is that it is not a sparse format and so will take more space, but it does not seem to be that big of a deal.

[dchaplinsky]

Great idea, works for me.

[dchaplinsky]

The only thing that I'd like to check is if BRAT has support for IOB (I don't remember to be honest).