Metacat

Updates that allow registry script to update the lastid field more efficiently
by calling the metacat 'getlastdocid' function for a given scope. Also some
debugging support added, and a bug where the error message was inproperly
saved across calls to metacat, resulting in spurious error messages.

This is the merge from the branch WEB_UI_REDESIGN_BRANCH back into the head.
The only files that have been removed are those in lib/style/eml2; other files
that have been cvs removed (only from lib/ and lib/style) have been re-added
elsewhere (i.e. moved from one directory to another)....