Update version for development 0.2.9
Default `apply_nesting` configuration
Process nested stacks as defined by configuration
Update default polling delay to 10 seconds. If nested stack found in progress, jump events to that stack.
Check for nested stacks on destroy and delete persisted templates if possible
Add note on what to do when nesting option is _not_ applied to the stack creation
Rescue out errors encountered while polling nested stack events
Raise in place of exit to prevent nested calls returning early
Add license information (#1)
Require `--file` flag when updating a template. Remove template parameter re-defaulting.
Update files for release v0.2.10