First try to implement drag and drop, now only with TH1 histograms
First try to implement drag and drop, now only with TH1 histograms

git-svn-id: efc72b515289bf6091237c55ffba4ad9f5a86ba2@2787 bcbf6573-9a26-0410-9ebc-ce4ab7aade96

bellenot/jsroot,root-project/jsroot,linev/jsroot,root-project/jsroot,bellenot/jsroot,linev/jsroot,bellenot/jsroot,asseldonk/jsroot,asseldonk/jsroot