Scripting - Core implementation (#629)

Scripting - Added plugin classes
Layers - Fix certain blend modes not working as intended
UI - Add customizable header per page
Profile editor - Hide the regular header
Profile editor - Added a new toolbar

src/Artemis.UI/Screens/Scripting/ScriptsDialogViewModel.cs

@@ -0,0 +1,24 @@
+using Artemis.Core;
+using Stylet;
+
+namespace Artemis.UI.Screens.Scripting
+{
+    public class ScriptsDialogViewModel : Conductor<ScriptConfigurationViewModel>.Collection.OneActive
+    {
+        public ScriptsDialogViewModel(Profile profile)
+        {
+        }
+
+        public ScriptsDialogViewModel(Layer layer)
+        {
+        }
+
+        public ScriptsDialogViewModel(ILayerProperty layerProperty)
+        {
+        }
+    }
+
+    public class ScriptConfigurationViewModel : Screen
+    {
+    }
+}