host our own, stable version of the jQuery Expander Plugin

This makes us independent of other websites on the one hand. On the
other hand, this change fixes a problem with Google Chrome and other web
browsers when accessing a META-SHARE node via HTTPS: some web browsers
automatically block JavaScript code from “insecure” connections (HTTP)
when the main page is hosted via HTTPS. By hosting our own version of
the plugin, we will typically also serve it via HTTPS when we serve the
main page via HTTPS.
remove unused web font references

This change also fixes a problem with Google Chrome and other web
browsers when accessing a META-SHARE node via HTTPS: some web browsers
automatically block JavaScript/CSS code from “insecure” connections
(HTTP) when the main page is hosted via HTTPS.