Core - Ensure application data folder exists

UI - Properly catch exceptions during exception display
UI - Display fatal exceptions during Core creation, even before Core initialisation

src/Artemis.Core/Ninject/CoreModule.cs

@@ -39,7 +39,14 @@ namespace Artemis.Core.Ninject
                     .Configure(c => c.When(HasAccessToProtectedService).InSingletonScope());
             });
 
-            Kernel.Bind<LiteRepository>().ToMethod(t => new LiteRepository(Constants.ConnectionString)).InSingletonScope();
+            Kernel.Bind<LiteRepository>().ToMethod(t =>
+            {
+                // Ensure the data folder exists
+                if (!Directory.Exists(Constants.DataFolder))
+                    Directory.CreateDirectory(Constants.DataFolder);
+
+                return new LiteRepository(Constants.ConnectionString);
+            }).InSingletonScope();
 
             // Bind all repositories as singletons
             Kernel.Bind(x =>

src/Artemis.Core/Services/RgbService.cs

@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using Artemis.Core.Events;
-using Artemis.Core.Plugins.Abstract;
 using Artemis.Core.Plugins.Models;
 using Artemis.Core.RGB.NET;
 using Artemis.Core.Services.Interfaces;