Limit text width in README (markdown)

Description

README.md and other markdown files are displayed in full display width. It means, on common desktop screen, container text has 200+ characters per line unless manually breaked. The recommended number is 50–80 CPL.

Subjectively, it's very hard to read such long lines and this is the reason I moved my projects back to BitBucket, preferring almost all other aspects of GitLab...

Proposal

Limit displayed text (markdown) width (CSS rule max-width) on page to be human-readable.

Links / references

http://graphicdesign.stackexchange.com/questions/13724/recommended-column-width-for-text-reading-digital-vs-printed