Module loading do not respect target frameworks in package

[patriksvensson]

As it is now, we will load every assembly found in the Modules directory. This will work as long as the module package only contains assemblies for a single target framework, but as soon as a module package targets more than one framework things will break.

When loading modules, the target framework monikers that are part of the package (net462, netstandard2.0 etc) path should be respected.