MOBSDK-723: Some tagging service calls return an error on 3.4.2
Merge pull request #288 from tmughal/master

MOBSDK-723
MOBSDK-725: The Client Certificate implementation is incomplete
Merge pull request #289 from mikeh/master

MOBSDK-725
MOBSDK-726: Workflow: Wrong query parameter "state" where it should be "status"
- Also helps fix MOBILE-2812: No information given on tasks that have been approved or rejected
- Fixed test fallout from making task and workflow model properties closer to the Android SDK equivalents
Merge pull request #290 from mikeh/master

MOBSDK-726
MOBSDK-726: Unit test follow-up fixes
Merge pull request #291 from mikeh/master

MOBSDK-726
MOBSDK-745: AlfrescoWorkflowProcess model object has a variables property which is not consistent with AlfrescoWorkflowTask
Merge branch 'master' of https://github.com/Alfresco/alfresco-ios-sdk