Tag v0.1.0
Add npmignore file instead of letting it default to gitignore

Looks like npm default to using gitignore as if it was the
npmignore file[1]. Seems like a nice default but in our case we
want to keep dist/oo.js out of git, but in the release.

Adding explicit npmignore file that doesn't exclude dist/oo.js

[1] https://npmjs.org/doc/developers.html#Keeping-files-out-of-your-package

Fixes #7.
Tag v0.1.1