Fix for bug on resetPassword

the resetPassword method was calling the validate method of
the repo but it was not giving the information from the
form to validate, it always returned false, making impossible
to change the password with a remind password token.
default data
Use $user instead of $data on validate on repository

I've removed the validate method on save, b/c it's on the branch of
is duplicated which is not needed.

Validate will be called inside save (thanks to ardent)
fix update remember token based on pull #273
Merge pull request #271 from marceloandrader/master

Fix for bug on resetPassword