Revision 163602

o Adding new repository cleanup tool which does:

 - artifact-to-POM correlation
 - artifact-to-MD5 correlation and synchronization
 - v3-to-v4 POM syntax conversion
 - v4 model validation (minimum required)
 - v4 model patching from POM path in repo (reconstructs some missing info from loss of <extends/>).

o This application has been tested and should be ready to run. Will try to arrange test with a copy of the ibiblio-v1 repo on beaver.