Added Comments

Firebird2D.EventPipelines/I_Pipeline.cs

@@ -6,11 +6,29 @@ using System.Threading.Tasks;
 
 namespace Firebird2D.EventPipelines
 {
+    /// <summary>
+    /// Interface for the Firebird event Pipeline
+    /// </summary>
     public interface I_Pipeline
     {
+        /// <summary>
+        /// Class witch owns the Pipeline and has the right to send events or delete the pipeline
+        /// </summary>
         object PipelineMaster { get; }
+        /// <summary>
+        /// Check if no one subscribed to the event
+        /// </summary>
         bool IsEventEmpty { get; }
+        /// <summary>
+        /// Subscribe to this event Pipeline
+        /// </summary>
+        /// <param name="handler">Handler witch should be Invoked when the event is send</param>
         void Subscribe(Delegate handler);
+
+        /// <summary>
+        /// Unsubscribe from this event Pipeline
+        /// </summary>
+        /// <param name="handler">Handler witch should be removed from the Pipeline</param>
         void Unsubscribe(Delegate handler);
 
     }