Merge pull request stackdio#117 from clarkperkins/develop

Bugfixes - deleting non-existant stacks

Merge pull request stackdio#115 from clarkperkins/develop

Added salt version to requirements

PI-184: Merge 0.4.x

PI-132 - Table now displays correctly when saving a new group. Rule f…

…orm now clears all fields except the protocol field so that user can enter more than one in a session.

PI-118: Merge