* bold the word alternative that people seem to be missing
* link to Limnoria's README.md for information what to do after cloning
the repository if someone clones it.
* mention that .rpm package is also available
* note that Windows users should run global installation commands with
Administrator rights and also remove `sudo` from beginnings of lines.
* note that pip should be upgraded if it fails to do any of the
installation commands when git is installed.
With help from \#supybot I understood that telling user to add `sudo` in
front of every command isn't very user-friendly.
If someone has root and is logged in as root, they know to remove the
`sudo` part and if they don't, but they have `sudo` installed,
everything works directly and `sudo` doesn't even ask for password.
