protocol conflicts resolved using master - regeneration needed

Update .NET Core build to use VS2017

Fixed Disconnect Every 60 Seconds

turned off auto ping to prevent from disconnecting every 60 seconds

Better support for optional arguments

Improve Enum handling

- Set NullValueHandling to NullValueHandling.Ignore, so that null values are not serialized
- If .NET primitive types (like bool or long) are optional, use nulltable types, so that they can be ignored when serializing

If the C# enum name does not match the JSON value, add an EnumMember attribute to ensure the mapping is done properly

Add support for .NET Core

Update the sample program to fix build

Fix deserialisation of responses

Add support for iOS devices

SendAsync: Add the ability to cancel the async task

Use a custom contract resolver in the CommandResposeFactory, to ensure that properties with private setters have their values set, too.