Doc: website: Update with a nicer development page and reorganized about page
Medium: scripts: Allow more compact syntax for steps

Steps can now be defined using <type>: <file> instead of
type: <type>
call: <file>

This:

  name: Do something
  type: apply
  call: do_something.py

Becomes:

  name: Do something
  apply: do_something.py
Low: scripts: Use simplified syntax in check-uptime