Null reset codes are not allowed (#545)

* Empty reset codes are not allowed

* Return false rather than throw exception when reset code is null

use json methods for various cookies

Signed-off-by: Suhayb Wardany <me@suw.me>

use json methods for various cookies

Signed-off-by: Suhayb Wardany <me@suw.me>

Revert "Model + Interface + Test: new updateGroups function added for…

… multiple add/remove user groups, tests added for single and multiple add/remove groups #477"

This reverts commit 0f1c2bc.

Signed-off-by: Suhayb Wardany <me@suw.me>

Conflicts:
	src/Cartalyst/Sentry/Users/Eloquent/User.php
	src/Cartalyst/Sentry/Users/UserInterface.php
	tests/EloquentUserTest.php

perform strict equality checks for persist codes

Signed-off-by: Suhayb Wardany <me@suw.me>

Merge pull request #420 from CodeYellowBV/master

When adding or removing groups on a user object, the merged permissions cache should be cleared.

make the BaseHasher abstract, final slowEquals

Thanks @shadowhand

Signed-off-by: Suhayb El Wardany <me@suw.me>

Merge pull request #386 from dberry37388/patch-4

makes user_id field nullable in throttle table

Merge pull request #371 from levacic/feature/2.1-cookie-fix

Fixed cookie handling in Laravel 4.0.*

Re-releasing Sentry 2.1. Refs #325.

Signed-off-by: Ben Corlett <bencorlett@me.com>