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

Update Iterators.md

Merge branch 'master' of github.com:rackspace/php-opencloud

Update Object.md