Readme update

README.md

@@ -1,5 +1,27 @@
-To keep the same formatting please consider using
+Window Maker webpage source
+===========================
 
-tidy -i -m 130 -m *.php
+This is a web page source files. All of the files should be proper markdown
+files accepted by [Jekyll](https://jekyllrb.com) static site generator.
 
-after modifying the sources.
+Build/serve
+-----------
+
+In order to build the site, you'll need Jekyll framework installed. Easiest way
+to achieve it, is to install it from system repositories.
+
+If your distribution doesn't contain it (even in external ones, like PPA for
+Ubuntu, AUR for Arch or some portage overlay from Gentoo), that it might be
+installed locally using [Bundler](https://github.com/bundler/bundler), which
+typical usage would be as follows:
+
+```
+$ cd window-maker.github.io && bundler init
+$ bundler add jekyll
+$ bundler exec jekyll serve
+```
+
+which will initialize gemfile, add jekyll to it, and then perform `jekyll serve`
+which underneath will build the site and than run simple http server on
+`http://localhost:4000` in development mode. More about jekyll you can find [on
+it's page](https://jekyllrb.com/docs)