Merge branch 'patch-2' of github.com:kuyan/python-guide into patch-2

* 'patch-2' of github.com:kuyan/python-guide:
  Add link to 'Python in a Nutshell'.
  Update link to 'A Byte of Python'.
  Update virtualenvwrapper documentation links.
  Update link to Gondor documentation.
  Update Gunicorn help link.
  Add Qt link.
  Use Wayback Machine to resolve a dead link.
  Update Travis CI URL because always https.
  Update tox URL.
  Update Buildbot URL.

Conflicts:
	docs/intro/learning.rst