Added "remember_token" column in the users table

The "Remember Me" functionality does not work on a fresh install of Confide as the migrations table does not contain the "remember_token" column. With the proposed change, the token value for the "remember me" session can be properly saved.
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
Merge pull request #270 from chiraggude/patch-1

Added "remember_token" column to the users table. Thanks!