Changes in v3.21

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Release notes for 3.21.0.6 since version v3.20.0.6
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***** 
	This version of NCrunch introduces changes to the grid protocol.  This means that grid node servers 
	must be updated before they can be used with the new version.
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Fixed an issue where the new MSBuild Extensions reference redirecting system in VS15.8 was preventing 
some projects from correctly negotiating runtime references to .NET Framework assemblies included 
using Nuget package references under .NET 4.6.1 and 4.7.

Improved error handling when collecting data for the Timeline report, this could under certain 
circumstances surface an exception.

Fixed a problem when targeting the x86 platform on .NET Core