Merged entity_record_limit_dao into entity_record_dao.
Removed sql_driver (it was unused).
Removed sql_lib::quote_field_name() (it was unused).
Updated DAO generator (still needs more stuff cleaned out).

Still not finished: $pdo_bindings var handling. (this is actually broken at the moment).
Memcached multi() is not working properly. The returned array does not have the right keys (the unset isn't working it seems).
Corrected bug with memcache cache driver's multi_get().
Corrected entity_record_dao's cache_batch_start() calls that were not using the lists engine.