Installation of Zizaco\ConfideMongo
First Usage of Zizaco/ConfideMongo.
	- I redefined afterSave() method to unable usage of email.

	- There is one error. The getKey method is unknown at User class. This error arise after the new user has been save(insert) and the confirmation is about to be display.
		Because of this error I am unable to check the confirmation email before login.
	- It turns out that the usage of zizaco/config for setting sign_email to false doesn't work at all. It's for this reason that I redefined the afterSave() method.
		I should test that again after solving the error.