Support for react-native-debugger

This library needs to create the function document.createElement at some point. This did however interfere with the standalone debugger react-native-debugger.

So I moved the creation of createElement to a later point and deleted it after usage. This should make this library more compatible with other libraries.

1.0.0 Version for ASP.NET < 5 (Not Core). Old SignalR client.

The 1.0.0 - 1.9.9 releases is running on ASP.NET < 5.
The following releases will be focused on ASP.NET Core and their new new SignalrR-client.

This last release (1.0.0) contains a fix for suppressed error messages.
Before you could sometimes see error : undefined when logging.
This has been fixed.

This release also contains a new README.md with new example code that runs against a test-server published on http://react-native-signalr.azurewebsites.net. This site will be up and running as long as I can keep it there. If it does not exit when you see this, the code for the site is in the example/server-folder of this repo.