Feature request: Accept .XCompose definitions for configuration data

[jmcwilliams403]

I've always wanted something like this program to replace WinCompose for me. Not sure if it's outside of scope or not.

[jtroo]

Perhaps one could write a translator for the xcompose file format to the kanata configuration format and include it in the repo somewhere. Or add a link to it in the readme. Might be the easier way to do it compared to parsing xcompose directly.

I don't think I'll get around to this any time soon, but I'd be happy to accept a PR.