Add the ability to not use a future dao when initializing a CachingDAO.
Add the ability to not use a future dao when initializing a CachingDAO.

foam-framework/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam,foam-framework/foam,jlhughes/foam,foam-framework/foam,jlhughes/foam,foam-framework/foam