* Update Cython version information for v1.10.1
- v1.10.1 has Cython==0.28.2
- Added the |cython_install| variable in some places
- Replaced the outdated information in `guide/basic.rst`
- Made sure the list in `deps-cython.rst` matches the table in
`installation-linux.rst`
* Match version tables; |cython_install| everywhere
- The version table adjustment wasn't included previously, fixed here.
- It was decided to replace it with |cython_install| variable everywhere