Finish 2.3
Finish 2.3.1
Finish 3.0
Update download.rst

Fix title level
Merge remote-tracking branch 'upstream/4.0-dev' into 4.0-dev
Single quotes, PEP 328, typo…
Single quote and PEP 328
Merge pull request #50 from Astalaseven/4.0-dev

Minor changes