replace static.cloud-ips with xip

cloud-ips.com has be depreciated - https://community.rackspace.com/general/f/34/t/623

use xip.io instead which will give working hostnames.
Merge pull request #69 from paulczar/swap_dns_suffix

replace static.cloud-ips with xip
[KNIFE-437] remove default region and make region required
Merge pull request #70 from rackspace/KNIFE-437

[KNIFE-437] remove default region and make region required
Revert "[KNIFE-437] remove default region and make region required"

This reverts commit 5d9b96449bcf0e279174b86eddaa9932629bc1bd.
[KNIFE-437] Re-implementation of removing the default region. This version takes into account the knife.rb file.
Merge pull request #72 from rackspace/KNIFE-437

[KNIFE-437] Re-implementation of removing the default region.
removing default_region