Merge pull request #7 from lumasepa/admin-command-clean

Admin command clean
Template and model of BaldeServer changed to be ordered by slot number
Fixed url syntax on update machine template.
Merge branch 'master' of https://github.com/tic-ull/arritranco
Changed the rack view to have the racks ordered and to show the down machines in the tool tip
Merge branch 'master' of https://github.com/tic-ull/arritranco into improve_rack_view
Merge pull request #8 from lumasepa/improve_rack_view

Improve rack view
Added verbose and dry run options to maintenance command
Merge branch 'master' of https://github.com/tic-ull/arritranco into admin-command-clean