Set progname for command line help.
Update requirements.

Remove ansible from requirements, it should be installed via virtualenv or as a system package.
Remove Fabric from requirements, mr.awsome.fabric installs it, if it isn't already available.
Use newest mr.awsome.ezjail which together with ezjail 3.4.1 fixes sporadic leftover ZFS filesystems when terminating a jail.
Update mr.awsome.ezjail to 1.0b6 which contains a fix for proxied instances.
Fix indentation.
Merge pull request #4 from fschulze/master

Set progname for command line help.