fixes #18 , you can once again nuke your own planet. Watch out you can fail if you leave agents home :)
 fixed #19 this will remove the network backbone but keep options open for adding it again
Merge branch 'nuke-own-planet'
Merge remote-tracking branch 'upstream/master'

Pulling the upstream back in the master
Merge pull request #22 from bertsarens/master

Nuke own planet + network backbone