Fixes pantheon-systems#145

version bump for 0.5.1 release

Merge pull request pantheon-systems#150 from pantheon-systems/version

Increment Version to 0.5.0

Merge pull request pantheon-systems#100 from pantheon-systems/redis

Redis cache clear should error when not available

Increment version

Version increment

Workflow class

Increment number for bug release

Merge pull request pantheon-systems#42 from calevans/master

changed array_keys to key since $artwork needs to be a string

Added interactivity for site command as well as various github.com is…

…sues addressed