Created basic entry point and application

Sandbox/src/SandboxApp.bf

@@ -0,0 +1,14 @@
+using System;
+using GlitchyEngine;
+
+namespace Sandbox
+{
+	class SandboxApp : Application
+	{
+		[Export, LinkName("CreateApplication")]
+		public static Application CreateApplication()
+		{
+			return new SandboxApp();
+		}
+	}
+}