added the new software module
updated script with new eml20 dtds
fixed error with exception handling in metacat servlet and added new dtds to the sql script
Modifications that change the package handling behavior of metacat. Packagemembership is now determined by an identifier being used as either the subjector object in a triple. One can not request arbitrary returndocs -- onlythose types that have package information embedded can be "returndoctype"...
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