versionwatch should ignore when there's a folder & jar which are identical

A while ago I added a facility to jar up feature and plugin folders so they could have their md5 sums compared.

Now, the vwatch tool complains when there's a folder and a jar present.

Two possible solutions to this come to mind:

a) ignore this - do not report as a problem

b) whenever a folder is jarred up, delete the source folder, so the above condition cannot occur