Default to a xip.io hostname
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Merge branch 'master' of github.com:beeman/now
run: use public-ipv4 instead of public-hostname when running on ec2

This make us compatible with xip.io scheme when running on EC2.
run: remove information about the DNS entry

As of #6, we now use xip.io, which handles all the DNS stuff for us.
new config options for cluster storage
Adds help function and shortcuts for all parameters
Removes empty string
Merge pull request #7 from beeman/master

Adds help function and shortcuts for all parameters
Adding experiment Debian support