Zone API support
Return Location Machine for locations.

The API would return the actual machine model rather than the
location_machine model.
Machine location create/update support.
Merge branch 'master' of https://github.com/scottwainstock/pbm
Add single response method for API responses.
Support new return_response to format responses.
Machine Location create/update format response
Update locations description, website, phone.
Create machines.
Removed xml support for API
Catch errors when models are not found for update
Merge pull request #250 from fmscode/master

Create/Update API support