Improve snappiness of web UI

[plajjan]

While the web UI is not particularly slow it could probably be made quite a bit snappier.

• Minify nipap.js
• Minify nipap.css
• Integrate tipTip.css into nipap.css
• Possibly move import of nipap.js to end of page as web browsers block download of everything until loading of javascript is done. This might require that we split up nipap.js into two files if there are functions in nipap.js that needs to run early on.
• Set cache headers to allow caching of material of static content at least
• Enable gzip compression for most resources.. where is this done? Will Apache do this automatically?
• Rebuild jQuery UI file. It's a 200+KB blob and I think it includes all UI widgets at this point. By rebuilding it and only including the needed widget we should be able to bring down the size considerably

What else?