Metacat

Added an explanation of "metacat context" to the Metacat Themes docs based on questions asked by an actual user following our instructions in the docs.

Edited the docs to incude more details about creating a custom theme

update to use 2.4.1 so the trunk has all artifacts for upgrades.

Changed some of the font and stlyes of the metacat docs for easier reading and fixed a big where the metacat admin "configure" buttons were not working

add generated diagrams for stats proposal -- seems to be our practice for other documentation pages.

add a link to the authentication interface page so users can more easily find information on how to add users to the auth file.

minor formatting error

Design document for the new Metacat statistics service

Minor edits on the new AuthFile features.

Add the documentation for the password file authentication.