all ajax request must be async

Right now the dashboard freeze everytime the SoftwareUpdate field was being updated
That's not cool
updated core changelog
Merge pull request #1236 from Zentyal/jgarcia/fix-dashboard-freezes

fix dashboard freezes
force proper depends
releasing users 3.2.11
releasing samba 3.2.15
Merge branch '3.2' into 3.4

Conflicts:
	main/core/ChangeLog
	main/samba/ChangeLog
	main/samba/debian/changelog
	main/users/debian/changelog
	main/users/debian/control