docs: Minor update on install guide
astakos: Fix trailing whitespace
astakos: Exclude terminated and empty projects

Update the usage view to not return terminated projects to which the
user has no assigned resources, because such projects provide no
usefull information to the user.
astakos: Improve handling of not active projects

Improve handling of not active projects in the Astakos usage page by:
* Hiding terminated project for a resource if the user has no assigned
  resources (zero usage)
* Display a warning if the project is terminated or suspended, instead
  of the coarse-grained 'NOT A MEMBER' warning.
Merge pull request #336 from cstavr/hotfix-0.16.1

astakos: Improve presentation of terminated projects
burnin: Correct Popen call for arp removal