Zap all .old files
Add ping helpers to ip.rb
Add v4? and v6? methods to IP classes.
Prefer v6 to v4 addresses when sorting IP addresses.
Simplify gemrc.
Merge pull request #156 from VictorLowther/pull-req-master-fda77fb192c9c1d39e5891586544cf031c6d65bf

https://github.com/crowbar/barclamp-deployer/pull/156

Merged by devtool for cloudedge