Change in group() method to use internal where

group() method uses now the internal where() method of the model that stores all the where filters instead using the DB CI library.
Merge pull request #581 from Patroklo/2

Change in group() method to use internal where
Removed escape_str from log-in query
Merge pull request #583 from nathanpitman/patch-1

Removed escape_str from log-in query
Update auth.php 

Added valid_email validation check to email field in forgot_password function.
Merge pull request #586 from arunu/patch-1

Update auth.php
Fix reset password code

+ fix password reset code to avoid non safe uri characters when enable
query strings is set to false.
Merge pull request #588 from sidewaysgravity/PasswordResetCode

Fix reset password code
Issue #566 Bcrypt password to 0

+ move salt prefix to config file with directions for php versioning
Merge pull request #589 from sidewaysgravity/SitePrefix

Issue #566 Bcrypt password to 0
Possible security problem

There is a possible security risk when activating users. In the activate() method, when you have the ID of the user and it's code, the code doesn't check if the code and id are from the same user. That could lead to wrong user activations, because you could send a code from another user(not very feasible, but still, it's a easly solvable security risk).
Merge pull request #590 from Patroklo/2

Possible security problem
UTF-8 Encode File
Merge pull request #591 from MichelAlonso/patch-1

UTF-8 Encode File
Update ion_auth_lang.php

Finish up the ion_auth_lang.php Indonesia Translation ^_^
Update auth_lang.php

I finish the auth_lang.php of Indonesian Language
Cheers,
@daengdoang
Merge pull request #600 from daengdoang/patch-2

Update auth_lang.php
Merge pull request #599 from daengdoang/patch-1

Update ion_auth_lang.php
Update auth_lang.php

better translations and corrections.
Merge pull request #602 from amatosg/patch-1

Update auth_lang.php