Fixed Italian translation of cellphone.
Merge pull request #298 from ServiusHack/italian_cellphone_translation

Fixed Italian translation of cellphone.
Hide user list when unusable for filtering.

The user list is hidden when it is empty or contains just one user. In
both cases it is of no use to the currently logged in user.
New permission to hide users in same group.

This permission is very helpful for simple users who should not be
allowed to see any other users in their group.
Merge pull request #300 from ServiusHack/hide_users_in_group

New permission to hide users in same group.
Merge pull request #301 from ServiusHack/hide_empty_user_list

Hide user list when unusable for filtering.
Fixed setting password for customers. (closes #299)
Merge pull request #302 from ServiusHack/issue/299

Fixed setting password for customers. (closes #299)
Disable display_errors. (closes #278)

It leads to more trouble than it helps if display_errors is enabled.
Merge pull request #303 from ServiusHack/issue/278

Disable display_errors. (closes #278)
Merge remote branch 'upstream/master' into mfkimai