[1.7.x] Fixed #22405 -- Fixed string error in models/queries docs.

Backport of 36de29200e1ea713c278f7672ab1790e1500c423 from master.
[1.7.x] Fixed #9535 -- Added a reference guide for file upload classes.

Backport of c8c2b8a638 from master
[1.7.x] Fixed casing of "GeoDjango".
[1.7.x] Added Python 3.4 to list of supported version in docs/intro/install.txt

Backport of a1fa6fcabc from master
[1.7.x] Fixed #16205 -- Added an installation for Windows.

Backport of d35d2f61c5 from master
[1.7.x] Refs #21230 -- removed direct settings manipulation from signed cookies tests

Backport of b9bfcd82f0 from master