Initial support for DNS
Added example document for DNS operations
Merge branch 'dns' of github.com:fernandes/fog-softlayer into dns

* 'dns' of github.com:fernandes/fog-softlayer:
  Initial support for DNS
Real tests for DNS

* API key needed to run tests
* no charges apply
* still no mock for objects
Minor fix on example doc
Mocks ok
Just forcing Travis build
Feature: Tests for serial increase and serial increase in mocks
Merge pull request #2 from fernandes/dns

DNS Initial Support