docs/quickstart.rst: update recommended Python version.

Signed-off-by: Daira Hopwood <david-sarah@jacaranda.org>
docs/quickstart.rst: update Python 2.7 download URL.

Signed-off-by: Daira Hopwood <david-sarah@jacaranda.org>
client.py: create node key even when storage is disabled. Closes #1945.

Thanks to Leif for the catch!
whitespace change to trigger buildbot for 1.10-b1