add maintainer responsibilities to README.md
- Keep a pristine copy of the repo on a computer you trust.
- Make periodic backups
- Push changes in pristine copy to gitlab
- Fix and report bugs.
- Commits-- short, precise commit messages. Bug fixes can include gitlab bug number, but they must also succinctly describe what they fix and how.
- Release-- follow build instructions for Ubuntu LTS, Ubuntu stable, Debian LTS, Debian Testing, OSX, Windows
- Post release binaries
- Watch for updates to nw.js and update build instructions accordingly