-BlockAllocator is no longer template

-Multithreaded IDManager.getNewID()
 *use implementation with free IDs stack (instead of classic pool)
-support for multiple UpdatePasses. Passes are added by name, and must be called between begin() end() functions.
-removed mutex from addEntity()
-commit() function added. Used to commit all changes made while update() call. Called automatically by begin() end() functions.

source/ecs/system.d

@@ -53,6 +53,8 @@ package:
     int m_priority;
     ///pointer to system implementation
     void* m_system_pointer;
+    ///system pass index
+    int m_pass;
 
     ///system name
     const (char)[] name;
@@ -66,7 +68,7 @@ package:
 
     EntityManager.Job[] jobs;
 
-    System*[] m_dependencies;
+    //System*[] m_dependencies;
     ushort[] m_read_only_components;
     ushort[] m_modified_components;