Install curl; nix stray backslash; use proper IP address
Merge remote-tracking branch 'upstream/master'

Conflicts:
	docs/sources/examples/python_web_app.rst
Use 127.0.0.1 instead of `hostname` in the "access the web app" section.
Merge pull request #657 from offby1/master

Minor tweaks to python_web_app.rst