Post request to addd participants
Merge branch 'develop' of https://github.com/izzappel/boom into develop

Conflicts:
	Boom/Boom/Controllers/BacklogOptionsController.cs
	Boom/Boom/Controllers/BacklogsController.cs
	Boom/Boom/Controllers/SurveyOptionsController.cs
	Boom/Boom/Controllers/SurveyParticipantsController.cs
	Boom/Boom/Controllers/SurveysController.cs
	Boom/Boom/Startup.cs
Merge branch 'develop' of https://github.com/izzappel/boom into develop