only add namespaces if there are some
add basic plugin bits, and start of a servlet to send over aggregate resource content
don't 500, 400 when param is bad instead
test -> main
add properties for main customizations we can do, default those to custom config so we can define core stuff in the normal way
Add high-level _featurebrowser_ component to be the basis for further development muck, just a tab panel which plugins can contribute to
replace data