DropWidget Item added

commit 0a96a06a5fc2a00e1d952753b5e42997a2cab04a
Author: michal <michal@michal-PC.(none)>
Date:   Sun Jan 12 22:05:40 2014 +0100

    DropWidgetItem improved, now inherits from two classes: DropItem and QListWidgetItem.

commit 4d4345a0e1a8808ad91566a50d1f9223872c96ae
Author: michal <michal@michal-PC.(none)>
Date:   Sun Jan 12 21:11:32 2014 +0100

    Before: Try make dropWidgetItem : public QWidgetItem

commit ce9a451a3b19b40cf48219dc3164595eb6386b90
Author: michal <michal@michal-PC.(none)>
Date:   Sun Jan 12 19:17:12 2014 +0100

    DropWidgetItem before inheritance