Engine

- Added an `Engine` which manages all promises and their tasks

source/eventy/engine.d

@@ -0,0 +1,30 @@
+module eventy.engine;
+
+import eventy.promise : Promise;
+import eventy.task : Task;
+
+/** 
+ * Engine
+ *
+ * The core of the event sub-system, this maintains
+ * promises, allows introspection and control over them
+ * and also allows creating them
+ *
+ * NOTE: Do we even need this? Promises can track (themselves)
+ * who is waiting for them
+ */
+public class Engine
+{
+    
+
+    public Promise create(Task task)
+    {
+        // Create a promise associated with this engine instance
+        Promise newPromise = new Promise(this, task);
+
+
+        return newPromise;
+    }
+}
+
+