I've added new properties called "styled-shared-path" and
"style-shared-relpath" that represent the directory in
$METACAT_HOME/lib/style/shared. This directory contains shared XSL
stylesheets that are similar to those found in $METACAT_HOME/lib/style/common,
but differ enough that they are not backwards-compatible, and therefore
needed a new location so as to not stomp on the common files used by skins
that were built prior to the PISCO skin.