Use https where possible
Merge pull request #494 from arthurvr/master

Use https where possible
Renaming Apple touch icon to "apple-touch-icon".
See #492
Merge pull request #507 from sgomes/master

Renaming Apple touch icon to "apple-touch-icon".
Remove Ruby references
Merge pull request #517 from coryarmbrecht/master

Remove Ruby references
Adding theme-color. Fixes #522
Improve and simplify install guide #526

It's currently both outdated and incorrect.
Install docs - add tldr for quick setup