Drazke

Results 2 issues of Drazke

Issue #284 New function : ``` db.driver.createPool(cb) --> return connectionId; db.driver.releasePool(connectionId); ``` Updated function : ``` Model.create(data, connectionId, cb) Instance.useConnection(connectionId).chainFunction() ```

needs feedback

with PR https://github.com/dresende/node-orm2/pull/742