The dev branch seems to be broken if you try and compile in WIndows Phone 8.1 it brings up the following compile error
Cannot resolve dependency to assembly ‘System.Runtime.InteropServices, Version=4.0.10.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event
I have tried switching back to 8.0 andit all compiles