[FIX] XQuery, maps: check for empty sequence. Closes #1012
[MIN] XQuery, #1012: Test added.
[FIX] XQuery: AND/OR optimization bug fixed.
[ADD] XQuery 3.1: fn:parse-json, fn:json-doc.
      http://docs.basex.org/wiki/XQuery_3.1#JSON_Functions
Update Hungarian.lang
Update Hungarian.lang
Update Hungarian.lang
Update Hungarian.lang
[FIX] GUI: reactive Shift-ENTER in the editor's search bar
[MIN] Formatting
[ADD] XQuery: Aligning JSON Serialization with W3 Working Draft
[FIX] XQuery parsing: normalize newline characters in comments and PIs
[FIX] XQuery: search with case-insensitive collation
[MIN] Formatting
[MOD] XQuery: better UCA collation support
[ADD] XQuery, Collation: Use ICU implementation if found in classpath.
      URL: http://site.icu-project.org/
[FIX] XQuery, Collations: starts-with code revised
[FIX] XQuery, map tests
[FIX] XQuery: permission test (ideally, sleep(...) should be removed)
[FIX] XQuery, order of descendant and child steps. Closes #1001