Add development guides (general and admin)

Squashed commit of the following:

commit 4400f032c236a77132c25d3342c819466d9b187b
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 08:41:54 2014 +0100

    Some refinement

commit 78d4f07af63c9293991f3eeaecee492a3bc75cf8
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 07:36:25 2014 +0100

    Expand dev/madek_guide

commit 8ce2e6223691492261a277d4c3486f4d42f6dc43
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Dec 16 13:45:02 2014 +0100

    Add initial development guides