Created jobs which will replace sequence with promise-based api

This allows it to run without compiler
(namely VS on Windows).

Image minification won't work when LWIP is
not available. App will warn you about it.

It will also generate lightbox for every image
even those which are under 512.

It also normalizes every path to path/to/file
from path\to\file.

image now allows two different values for image url

image = "image.png"
leads to static/20xx/articlename/image.png
to be used for unique lead images

image="/images/name.png"
leads to static/images/name.png
to be used for unique lead images