Release 2.31.

Fixed a bug whereby the temporary file created when taking a photo (for adding/editing of contact) will not get deleted if the user chooses to cancel his actions halfway.
Added copy when viewing a Contact information. Everything is copiable except for Ringtone and Groups.
Added preference for showing "Text" action for mobile numbers only. The code was actually 1/2 done already, I believe by ChainsDD.