[FIX] XQuery, #703: raise error if Java string has invalid XML chars
[FIX] XQuery: disallow full optimization of opened dbs. Closes #702
[MIN] XQuery: optimized query output
[MIN] XQuery, type of third fn:serialize() argument
[MOD] XQuery, German formatter: Umlauts replaced with Unicode strings
[MIN] Core, Levenshtein: convenience function added
[MOD] XQuery, tests: check for Err name (instead of error code)
[MOD] XQuery, functions: redundant code removed; constructors added
[MOD] XQuery, #701: treat Java values as items
[MOD] XQuery, error codes updated
[MOD] XQuery: CHECKSTRINGS option, casting extenal strings. Closes #703.
      Documentation: http://docs.basex.org/wiki/Options#CHECKSTRINGS
[ADD] XQuery, updated higher-order function signatures:
      http://docs.basex.org/wiki/Higher-Order_Functions
[MOD] Commands, XQuery: filename added to query info.
[ADD] XQuery, Database Module: db:name(), db:path(), db:export()
[MOD] XQuery, Database Module: functions no longer accept database nodes
      as reference. More: http://docs.basex.org/wiki/Database_Module
[FIX] GUI, Export dialog: parameter choice revised
[MIN] XQuery, better error feedback
[FIX] GUI: also allow to execute non-xquery files
[ADD] Core, Create database: allow more characters for db names
[MOD] Server: port added to start/stop server strings
[MIN] GUI: Execute query: show shortcut