Merge pull request rackspace#520 from ycombinator/alpha

Using a stable version of the json-patch-php package.

Merge pull request rackspace#499 from rackspace/working

Merging working -> master in preparation for patch release

Merge pull request rackspace#487 from ycombinator/release-process-doc

Documenting release steps

Merge pull request rackspace#435 from rackspace/working

Merging working -> master in preparation for minor release

Merge pull request rackspace#360 from kiddivouchers/fix-ptr-delete

Fix deleting PTR records

Bumping up version.

Attempting to get around Travis/Github API rate-limits

Adding changelog

Allowing for LB Nodes to be updated

Fixing Content-Type for POST/PUT requests