Add a gitignore file

[bookholt]

Having a .gitignore is handy. This one has some extra stuff in it that's probably not strictly necessary in most cases, but it also doesn't seem unreasonable to me.

[ifratric]

Thanks for contributing! (Will review the other submission as well).

As a huge fan of minimalism in software development: Which lines do you think would be actually relevant for the project? E.g. what prompted you to add the file.

On the other hand, there are also lines that can be added to account for problems I encountered before, specifically

• .DS_Store
• A directory for generating samples when testing (to be passed to --output_dir flag). I usually use test but can be also renamed to something else (e.g. testsamples) in case actual test code gets added later.

[bookholt]

I removed a few stanzas that seem unlikely to be necessary for Domato use cases that I could imagine, and I also added an entry for .DS_Store.

[ifratric]

Cool, thanks!