CDClient cleanup and optimization (#1023)

* CDClient cleanup and optimization

- Use static function to get table name
- Remove unused GetName function
- Replace above function with a static GetTableName function
- Remove verbose comments
- Remove verbose initializers
- Remove need to specify table name when getting a table by name
- Remove unused typedef for mac and linux

* Re-add unused table

Convert tables to singletons

- Convert all CDClient tables to singletons
- Move Singleton.h to dCommon
- Reduce header clutter in CDClientManager

dGame/dComponents/ScriptedActivityComponent.h

@@ -13,6 +13,8 @@
 #include "Component.h"
 #include "eReplicaComponentType.h"
 
+#include "CDActivitiesTable.h"
+
  /**
   * Represents an instance of an activity, having participants and score
   */