Split the DragDropDXE2 package into Run/Design packages.

I was unable to use the Drag and drop components in a 64bit Delphi XE2
project. The DragDrop package wouldn't compile. Splitting the
DragDrop package into run time and design time packages helped resolve
the problem.
misc: Changed dproj files. I'm not sure if they are needed for the master.
Merge pull request #7 from veryangrymobster/master

New DragDrop packages for Delphi XE2