Option to clear existing comments on new SGF

[neagle]

A user writes: "Is it possible for gokibitz to strip the comments out of an sgf? I imported file from OGS and it included our conversation in chat, which I didn't want."

This is definitely possible (programmatically, there's nothing challenging about it), but figuring out how / where to offer it in the UI is harder.

[bencodezen]

From a UX/UI perspective, I think the best upfront value is to have an option on the upload page. Essentially, there would be a checkbox right before uploading giving the users "Remove all comments from kifu." If they check it, then the script would be kicked off to clean it up before finally uploading it to the server.

Just my two cents.