-formatted all files with dfmt

-more messy tests
-some documentation
-some useful code moved to functions
-adding components to existing entity
-opportunity to get entity by ID
-fixed calculating deltas
-sorting IDs arrays for allocating Templates
-fixed alignment caluclation
-added compile-time checks for "component_id" member existing in component

source/ecs/system.d

@@ -12,13 +12,15 @@ struct System
 
     void enable()
     {
-        if(!m_enabled && m_enable)m_enable(m_system_pointer);
+        if (!m_enabled && m_enable)
+            m_enable(m_system_pointer);
         m_enabled = true;
     }
 
     void disable()
     {
-        if(m_enabled && m_disable)m_disable(m_system_pointer);
+        if (m_enabled && m_disable)
+            m_disable(m_system_pointer);
         m_enabled = false;
     }