Darken classic style icons.
Merge pull request #160 from planctechnologies/dev

Warn when deleting cloud instance with running devices
Fix logic when checking for transparency or border_style.

A value of 0 is valid for both transparency and border_style. Python evaluates 0 to be False.

Fixes #161
Merge pull request #162 from dlintott/fix_161

Fix logic when checking for transparency or border_style.
Run ASA devices
Have the classic icons a little less dark.
Catch OSError exception for subprocess calls.
Update vpcs download location, fix error message
Spelling fix
Merge pull request #165 from planctechnologies/gns-165

Run VPCS devices on cloud servers
Merge pull request #166 from planctechnologies/gns-167

Fix ASA devices in qemu
Merge branch 'master' into dev