-changes in gitignore

-changed "absent" to "excluded" everywhere
-added Events support:
 *systems are scanned by handleEvent() function
 *generate system callers for events
 *event sending have (untested) multithreaded support
 *EventInput structure in System has input components for event

source/ecs/system.d

@@ -61,6 +61,12 @@ struct System
         return m_id;
     }
 
+    struct EventCaller
+    {
+        ushort id;
+        void* callback;
+    }
+
 package:
 
     ///should system be executed in current update?
@@ -82,8 +88,8 @@ package:
 
     ///required components
     ushort[] m_components;
-    ///absent components
-    ushort[] m_absent_components;
+    ///excluded components
+    ushort[] m_excluded_components;
     ///optional components
     ushort[] m_optional_components;
 
@@ -93,6 +99,8 @@ package:
     ushort[] m_read_only_components;
     ushort[] m_modified_components;
 
+    EventCaller[] m_event_callers;
+
     //void function(ref EntityManager.CallData data) m_update;
     void* m_update; ///workaroud for DMD bug with upper line