Updated development Pods.
Accomodate for cocoapods-packager changes.
Ignore errors if pyenv is already installed.
Extract code related to request serialising.
Update development Pods.
Use Authorization header instead of query parameter for access tokens.
CDAError.h should be public.
Support for PUT requests.
Added assertion.
Updated development Pods.
Improved handling of content-type header.
Simplify handling of system attributes.

Also added "version" as a system attribute that is passed through.
Reintroduce aliasing of "publishCounter" to "revision" in preview-mode.
Allow system attributes to be updated after a PUT request.
Properly expose methods for POST and PUT.
Make it possible to easily create a new API client for a Space.
Updated development Pods.
Private option to use management API semantics for the API client.
Don't throw an error when no data is expected.

Status code 204 indicates that there is no HTTP body, so none should be expected.
Small fixes for CMA compatibility.