add keywords, tokens, long_description... (alter them if you like!)
authors: we could use a comma-separated string to list several authors (which seems to be the commonpractice) and add a maintainer field. I've added an example, but if used, this has to be extended of course. What do you think of it? Or do you may prefer to leave just one author?
add license file (so it's clear that everyone can use the code)