Improves error message handler when file API calls result into an error

Jira issue: APPPARTY-59
Merge pull request #30 from eelcocramer/APPPARTY-59

Improves error message handler when file API calls result into an error
Mockup for voting inside IVI application
Added hooks for determine host user

JIRA-ISSUE: APPPARTY-38
Added hooks for determine host user

JIRA-ISSUE: APPPARTY-38
Merge branch 'APPPARTY-38' of http://github.com/easy-s/app-PartyPlayer into APPPARTY-38