Type.GetType returns null at least for types from the current assembly

[MatthiasJentsch]

Details about Problem

nanoFramework area: nanoCLR preview 791 / nanoFramework.CoreLibrary preview 62

Worked before? No

Detailed repro steps so we can see the same problem

using System;

namespace NFApp1
{
	public class Program
	{
		public static void Main()
		{
			Type type = Type.GetType(typeof(Program).FullName);
		}
	}
}

type is null. But the documentation stated:

If the type is in the currently executing assembly or in Mscorlib.dll, it is sufficient to supply the type name qualified by its namespace.

[MatthiasJentsch]

With the fix for #397 that is also fixed.