Consolidating info from dev/env.rst on virtualenv
Fixed new line so code-block shows
Added example
Merge Ununtu and Debian
Merge pull request #493 from amiralis/master

Fix Ubuntu link
Grammar fix
Removed virtualenv and linked to central location
Removed virtualenv and linked to central location
Removed virtualenv and linked to central location
Removed virtualenv and linked to central location
Fix link to Pillow
Merge pull request #496 from jo/patch-1

Fix link to Pillow
Title style fix in env.rst
Title style fix in linux.rst
Title style fix in osx.rst
Title style fix in win.rst
Merge pull request #495 from tbarn/master

Combined and centralized virtualenv docs, fixes issue #123
Fix typo.
Merge pull request #498 from NickButcher1/master

Fix typo.