Update version for development 1.0.21
Skip directory creation if `:none` defined
Check type of path prior to destruction
Add `#execute` method and implementation for containers.
Wrap execute in custom tmp command. Include optional networking support (defaulted on)
Update `Lxc#info` to not be dependent on explicit output (`lxc-info` output changes depending on version)
Allow `info` command to accept failure on shellout
Downcase state prior to symbolizing
Scrub bundler environment variables before shelling out
Don't assume root as working directory
Update files for release v1.0.22