Commit before pull :)
Merge branch 'master' of https://github.com/pryv/sdk-dotnet

Conflicts:
	PryvDotNetSdk/PryvDotNetSdk.PryvClient/PryvDotNetSdk.PryvClient.csproj
	PryvDotNetSdk/PryvDotNetSdk.UnitTest/PryvDotNetSdk.UnitTest.csproj
Access token retrieval process redesigned and test covered