Change README links to full URLs

These links were broken when viewing the repo on github.
Merge pull request #41 from grncdr/patch-1

Change README links to full URLs
updated from master
adding record support
domain records
Update() method
updated with application/json content
Add tenantName to OpenStack example

It was referenced in the text but not actually present in the example.
fixes for domain create/update
refactoring to support code reuse
adding (integration) tests
dns work
tests the DNS::Domain functionality
regenerated docs
unit tests for domains
Merge pull request #42 from grncdr/patch-1

Add tenantName to OpenStack example
merge from master
added subdomain support
turned off debug mode
enhanced test script