TODO: fix lightboxes

Moved all not yet promisified files to sitegin/legacy

Config - returns configuration
ReadFiles - reads files from config.articlesLocation
Print - prints everything it gets

Created jobs which will replace sequence with promise-based api

- When paragraph has image its not p but div.has-image
- You can specify image dimensions in markdown

- Misc crash fixes

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.

+ Better compileonly exit detection

Metadata: lang="c"
You can only select lang for whole article for now

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

 - now I understand how it works ;)

metadata: allow override date and author from metadata
format:
[author]
name = "Name"
email = "my@email.com"
[date]
creation = "2015-07-31"