Basic update, multithreading emplate support, fixed

-Added possibility to add entity form template + components to replace template data
-basic tests for new functionality
-small performance improvement for events
-added ComponentRef structure which contain data pointer and component ID
-now events are called before entities removing

source/bubel/ecs/block_allocator.d

@@ -62,6 +62,7 @@ private:
     {
         next_block = cast(void*) Mallocator.alignAlloc(
                 block_size * blocks_in_allocation, block_size);
+        if(next_block is null)assert(0);
 
         if(pointers is null)pointers = Mallocator.make!BlockPointers;
         if(pointers.numberof >= 32)