Making sure that we only create short URIs for uris that can really be shortened!
Added list of BWB element that can have short expression and work uris
Added sameAs links between short and long work uri, added realizes link between expression_uri and short work uri
Added link to prov activity for every element
Merge branch 'master' of https://github.com/CENMetaLex/metalex-converter

* 'master' of https://github.com/CENMetaLex/metalex-converter:
  Fixed problem with divisie
  Fixed empty group problem
  Fixed regex to include number/index
  Added owl:sameAs between short work and work
  Ahum
  Added metalex:realizes relation
  Usage instructions
  new name
  Fixed weird bug with attributes, added sameAs assertions