[FIX] XQuery, modify clause and switch expression: update checks
[FIX] Server: skip "Potential bug" warning in expected error messages
[FIX] Commands: reset query file path. Fixes #757
[ADD] XQuery, CSV Module: http://docs.basex.org/wiki/CSV_Module
[FIX] Minor fixes
[ADD] XQuery: CSV and JSON parser and serializers updated:
      http://docs.basex.org/wiki/CSV_Module
      http://docs.basex.org/wiki/JSON_Module
      http://docs.basex.org/wiki/Serialization
[MOD] XQuery, Parsers: optimizations in CSV/JSON code
[MIN] XQuery: better error feedback
[FIX] GUI, Info View, stack traces: ignore HTML snippets