This patch splits consecutive message if they are more than 15 minutes apart.
This patch splits consecutive message if they are more than 15 minutes apart.

Squashed commit of the following:

commit 6dbfce645fec6e3d8940410ef20b0b4a0c6607f6
Author: Benson Tsai <btsai@vrwarp.com>
Date:   Fri Feb 13 16:39:09 2009 -0500

    changed capitalization

commit c73c897319acd2cfc123791522ff9184e7d3ce57
Author: Benson Tsai <btsai@vrwarp.com>
Date:   Fri Feb 13 10:28:05 2009 -0500

    using static const for time

commit e733431a39643f30844af0b79eed71e042647431
Author: Benson Tsai <btsai@vrwarp.com>
Date:   Thu Feb 12 17:10:08 2009 -0500

    consecutive message fix

svn path=/trunk/KDE/kdenetwork/kopete/; revision=926342

josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,Jtalk/kopete-fork-xep0136