[MIN] GUI Editor, Ctrl-K: add spaces in XQuery comments
[FIX] XQuery, JSON/CSV, lax=false,format=attributes: conversion of '_'
[MOD] XQuery: only show "db:open(...)" info for disk-based DBNodes
[MIN] XQuery, empty sequence type: always assign item()
[MOD] XQuery: show similar function name if function is not found
[FIX] XQuery, detect impossible casts/promotions of expressions before
      they are removed. Closes #865.
[FIX] XQuery: show similar function name if function is not found
[ADD] unit test: correct references for transform copy data instance
[MIN] GUI Editor, Ctrl-K: consider spaces when uncommenting code
[MOD] XQuery: Use `return` instead of `throw` for tail-call elimination.
[MOD] Separate tail call into separate method.
Merge pull request #871 from LeoWoerteler/ret-tco

No More Exceptions for Tail-Calls
Merge branch 'master' of github.com:BaseXdb/basex
[MOD] GUI, Project View, Ctrl-H: filter by currently opened file type
[FIX] Commands, REPO INSTALL: do not delete existing files in pkg dir.
VERSION 7.8.1 (February 26, 2014)

 ADDED
 * Editor, Ctrl-H: filter by opened file type and selected text
 * XML Parsing: support for TAR & TGZ

 UPDATED
 * XQuery errors: function not found -> suggest similar one
 * Commands: improved parsing (allow more whitespaces)
 * French translation (thanks to Maud Ingarao!)

 FIXED
 * XQuery Update: nested transform expressions
 * XQuery: always return boolean when calling doc-available()
 * XQuery: disallow impossible casts before removing variables
 * Binary Module: iterative evaluation of bin:octets()
 * Commands, REPO INSTALL: install packages in same directory
 * CSV/JSON: serialization of underscores
[MIN] Switched to 7.8.2 beta
[FIX] XQuery, GH-867: ClassCastException in updating inline functions.
Merge pull request #876 from LeoWoerteler/gh-867

[FIX] XQuery, GH-867: ClassCastException in updating inline functions.
[MOD] Commands: static function for creating backups