master is broken

[MovGP0]

@xVir The unit test are currently broken and the Travis Build Server is apparently not running.

ApiAiSDK.AIServiceException : Invalid request content type, expecting "multipart/form-data" or "application/json; charset=utf-8.
  ----> ApiAiSDK.AIServiceException : Invalid request content type, expecting "multipart/form-data" or "application/json; charset=utf-8.
   at ApiAiSDK.AIDataService.VoiceRequest(Stream voiceStream, RequestExtras requestExtras) in C:\Users\movgp\Documents\ApiAi\ApiAiSDK\AIDataService.cs:line 166
   at ApiAiSDK.ApiAi.VoiceRequest(Stream voiceStream, RequestExtras requestExtras) in C:\Users\movgp\Documents\ApiAi\ApiAiSDK\ApiAi.cs:line 75
   at ApiAiSDK.Tests.ApiAiTest.VoiceRequestTest() in C:\Users\movgp\Documents\ApiAi\ApiAiSDK.Tests\ApiAiTest.cs:line 71
--AIServiceException
   at ApiAiSDK.AIDataService.CheckForErrors(AIResponse aiResponse) in C:\Users\movgp\Documents\ApiAi\ApiAiSDK\AIDataService.cs:line 194
   at ApiAiSDK.AIDataService.VoiceRequest(Stream voiceStream, RequestExtras requestExtras) in C:\Users\movgp\Documents\ApiAi\ApiAiSDK\AIDataService.cs:line 159