updated vagrant-libvirt documentaion
fix minor spelling error
The screencasts disappeared. shelr.tv is down.
Move automagic method to top.

Add the new commands for the bootstrap_develop script,
Add an explanation to install the `bitmask-root` file,
Split in automatic/manual sections and move automatic to the top.
Add --always-unzip option to avoid import errors.
updated vagrant notes in development.md
Merge branch 'master' of ssh://code.leap.se/leap_doc
added first version of single node quick start guide, wip