Metacat

I'm adding the PISCO-specific XSL stylesheets used to transform EML documents to PISCO web pages. Notice that resultset.xsl is now in this templates directory, rather than in lib/style/common since it has PISCO-specific styling.

I'm adding in a number of supporting image files that make up the PISCO header, navigation bar, and footer sections of the styled web pages.

I'm adding the legacy PISCO skin to metacat as a starting point to doing CSS-based XSL styling of XML documents in the data catalog. These files were based off of the OBFS and KNB skins.