Bugfix: Replaced wrong variable definition

I've replaced the wrong variable definition (from # to $). # is a comment in bash.
Merge pull request #2 from mschnitzer/shutdown-nodes

Bugfix: Replaced wrong variable definition
Bugfix: The adminnode will stay online

The program is now checking, if a node is having the "crowbar" role. If so,
the node will stay online after executing the script.

Minor changes: Output improving with colors for a better overview.