Some margin between node boxes.
Merge pull request #27 from anryko/master

Changed backend API for consistency
Add simple (not really scaling) D3+Cola based node relationship chart.
Merge branch 'master' of https://github.com/lwindolf/DevOps-Trouble-Map
Ensure all connections nodes exist to avoid exceptions in cola.
Merge pull request #28 from anryko/master

Merged monitorig API to backend
Clickable nodes in nodes chart.
Ported backend to full compatibility with Python2.7 and packages provided by Ubuntu 12.10