Packaging quick reminder

Ensure version numbers in setup.py and doc/qr.1 have been updated.

Check twine and wheel are up to date:
```
pip install --upgrade twine wheel
```
Delete contents of dist/:
```
rm -r dist
```
Package it up:
```
python setup.py sdist bdist_wheel
```

Sign it:

gpg --detach-sign -a dist/*.gz
gpg --detach-sign -a dist/*.whl

Upload it:
```
twine upload dist/*
```