Fixed plugin binding and reworked some interfaces to abstract classes

src/Artemis.Core/Plugins/Abstract/ModuleViewModel.cs

@@ -4,8 +4,13 @@ using Stylet;
 
 namespace Artemis.Core.Plugins.Abstract
 {
-    public abstract class ModuleViewModel : Screen, IModuleViewModel
+    public abstract class ModuleViewModel : Screen
     {
-        public PluginInfo PluginInfo { get; set; }
+        protected ModuleViewModel(IModule module)
+        {
+            Module = module;
+        }
+
+        public IModule Module { get; }
     }
 }