python: docs update
* Expanded the section on issues with Windows installations, with greater detail of which versions of Visual Studio are needed depending on which version of CPython is to be used. * Included a recommendation which is a bit harsh without being totally prickish. * Updated all files to not link to author's key or related data in order to make them all consistent with the changes in commit 649b19688132dd315e361c0f5b63ba6d8f45996d.
- Signed-off-by: Ben McGinnes <email@example.com>