First I used the download builder with the two corresponding items checked (drag and drop). the custom build didn't work. Syntax errors (missing closing braces). After fixing those manually, simple drag works.
Now I want to restrict movement to parent: got an error 'drag.limit is not a function'.
So I got frustrated and downloaded the hole package, since there's no hint on the page, what packages are needed to make drag.limit(...) work.
Using the full download and the same code which worked above (without drag.limit), I get a 'too much recusrsion' error.
So this is supposed to be a major release????????????
BTW, the drag and drop examples on your site don't even work (using the latest versions of FF and Chrome) ...
Hm good point, the plugins should probably be included in the download builder by default (they aren't at the moment). Can you make your code a breaking Fiddle? This might be a bug. Does it break with the drag.limit part commented out already?