2.0.2

Fixed

• Fix handling of corpora with special characters like umlauts or slashes when
  deleting corpora, getting the corpus configuration file, getting linked files
  (both the CorpusStorage API and the web service).
• Expliclity escape / in node names so we can create hierarchical paths in
  node names. We already have this assumption at several places, but a corpus
  with slashes would create ambiguities. This also helps when creating linked
  files base on the node name. Also, escape all characters that are invalid file
  names on Windows, because the node name might be used as file name.