Extract archive

Simplified archive extraction. Cloud Commander suports: zip, .tar, .tar.gz, .gz and tgz.
In previous versions to unpack zip, --packer option have to be changed if current option is tar and vice versa. Now all archive types supported for extraction by default.

To change packing mode --packer option should be used.

fix

• (listeners) header: event.path -> getPath (#101)

feature

• (cloudcmd) simplify archive extraction for: zip, tar, gz, tar.gz, tgz