Improve readability

[obulat]

Fixes#77

Replace text-align: justify from the classic.css with text-align: left
Set line-height to 1.4 instead of 130% for some elements

[JulienPalard]

Beware I rebased your branch on top of master.

Oh and I tried fingerprinting the css as you told in the cache issue.

[JulienPalard]

(If we keep this fingerprinting method, we'll have to describe it in the README, to try to avoid forgetting to bump this version at release time...)

[JulienPalard]

Can be tested at: https://docs.python.org/3.10

[JulienPalard]

Thanks @obulat \o/

[ambv]

@JulienPalard, can we please release this on PyPI? I will be building 3.9.7 on Monday and would like text not to be justified.

[JulienPalard]

I think this is a good idea, yes.

@Mariatta@willingc ^

(As I don't have the rights)

[willingc]

@JulienPalard What's your PyPI username? I will give you rights.

[JulienPalard]

@willingc I'm https://pypi.org/user/JulienPalard/.

[willingc]

@JulienPalard You should have an invite as a maintainer on this project.

[JulienPalard]

@ambv2021.8 released!
@willingc thanks!