PostRequestHandler uses Auth headers
Merge pull request #126 from AnthonySteele/PostTests

PostRequestHandler uses Authorization header
Merge branch 'master' into http_methods

Conflicts:
	src/SevenDigital.Api.Wrapper.Unit.Tests/EndpointResolution/RequestHandlers/GetRequestHandlerTests.cs
	src/SevenDigital.Api.Wrapper.Unit.Tests/EndpointResolution/RequestHandlers/PostRequestHandlerTests.cs
	src/SevenDigital.Api.Wrapper/EndpointResolution/RequestHandlers/PostRequestHandler.cs