Fixed: Deleting the attachment deletes the  recepients too (bug#10334).
Squashed commit of the following:

commit 659c42686f319595d61d17f0be82c4974cde6212
Author: s7design <otrs@s7designcreative.com>
Date:   Fri Mar 14 15:06:05 2014 +0100

    [Bug 10334] Deleting the attachment deletes the recepients , too

    Changed wrong  variable in  AgentTicketForvard.dtl, and added increment counter for Customer for MultipleCustomerTo/ MultipleCustomerCc/ MultipleCustomerBcc

Conflicts:
	Kernel/Output/HTML/Standard/AgentTicketForward.dtl
Fixed missing objects error by converting to ObjectManager.
Fixed display of AgentLinkObject.
Added the possibility to set a language for (customer) users generated in UT.
Fixed XML2Docbook script.
Ported to ObjectManager.
Removed obsolete/unneeded scripts.
Implemented first version of frontend UT for AdminACL.
Code cleanup.
Code cleanup.
Fixed bug#5114 - No Rich Text Editor on Notification (Event).
Merge remote-tracking branch 'upstream/master' into otrs-master