Stop trying to use mirrors. They don't do anything.
Reflect the fact that paramiko is py3 compatible

Since version 1.13.0 paramiko has python 3 support, update the documentation to reflect that.
Cut 1.7.4
Merge branch '1.7' into 1.8
Cut 1.8.4
Formatting to match master
Merge branch '1.7' into 1.8
Merge branch '1.8'

Conflicts:
	sites/www/changelog.rst
Cut 1.9
Gah
Merge branch '1.7' into 1.8

Conflicts:
	fabric/version.py
Gah part 2
Merge branch '1.8' into 1.9
Gah part 3
Provide correct path to the installing.rst documentation
Don't pin Jinja2 in Travis CI.

Since we're not even running the tests against Python 2.5, I see no reason to force an older version of Jinja2.
Add version added for env.effective_roles variable.
Add FAQ about Mavericks setuptools woes
Tweak FAQ language, it's not Mac specific
EVEN MOAR fixes to that FAQ