HttpBatchHandler

HttpBatchHandler for ASP .NET Core 3.0

Currently working

• Customization of batch handler by OnXXXEvents
• HttpContent for batch requests (the old WebAPI 2.0 libraries should not be necessary anymore)

TODO

• Edge case error handling
• The library should be probably split into two parts, one for the requests and one for the actual batchhandler

Deprectaed

See #29 for thoughts about a better, less coupled approach.