Basic i18n support for labels; rename conf:loadVocabulary

* If vocabulary labels exist in multiple languages, the right one is now shown
* conf:loadVocabularyFromURL renamed to conf:loadVocabulary
* The title case algorithm for labels now splits CamelCase and better handles dashes
* dcterms:title and dcterms:description are recognized by default as label/commentProperty
Fix listPropertyValues broken earlier
Autodiscover high-degree props; value pages w/o prefix decl

* High-degree properties are now automatically recognized
* Value pages now work for properties without declared namespace