Spotty 1.1.0
- added the "availabilityZone" parameter
- added the "retain" deletion policy
- capability to attach existing volumes to the instance
- "snapshotName" parameter renamed to "name"
- set the "create_snapshot" deletion policy as a default one
- auto-resize volumes restored from snapshots
- display current spot price once an instance is started
- checking the maximum price before starting an instance