System.File: fix mkdir_nothrow()
System.File: add redraw in copy/move
System.File: update document
System.File: use system() instead of :!
vitalizer: :Vitalize didn't work
vitalizer: Add synopsis to document
System.File: Fix for Vim 7.4.122
Process: Fix #166
Merge pull request #167 from mattn/fix_166

Process: Fix #166
Data.String: Add levenshtein_distance({str1}, {str2}) function.
Merge pull request #168 from kamichidu/levenshtein_distance

Data.String: Add levenshtein_distance({str1}, {str2}) function.
System.File: use system() instead of :!, thx @mattn
System.File: add /y option to move command
System.File: move(): use move_exe() when a:src is directory

Currently s:move_vim() does not support
moving a directory.
System.File: fix filepaths to suit for copy command
Merge branch 'sys.file' into merge-sys-file

Conflicts:
	autoload/vital/__latest__/System/File.vim
Process, System.File: old system() needs iconv()

* Add encoding: Old system() assumes argument's command is encoded by system
  encoding (does not encode its own).
* Add decoding: Old system() returns raw string encoded by system encoding.

This behavior was changed in 7.4.122:
  https://groups.google.com/forum/#!searchin/vim_dev/7.4.122/vim_dev/KXzoTZz3-MY/HiyvvjPWsssJ

cf.
* Issue #126
* Commit 8a98fc562370c5e9de2b6b44cb786ad12c206336
* Patch 7.4.122
  https://groups.google.com/forum/#!searchin/vim_dev/7.4.122/vim_dev/KXzoTZz3-MY/HiyvvjPWsssJ

Thanks @k-takata to point out this problem.
System.File: copy_exe(): add /y option to copy command
System.File: copy_exe(): support env &shell is not cmd.exe (#126)
Merge branch 'old-system-needs-iconv' (close #169)

Conflicts:
	autoload/vital/__latest__/System/File.vim

And previous commit(4243d6e) message is slightly wrong.
system() returns raw string encoded by system encoding yet (Thanks @k-takata).

-Add decoding: Old system() returns raw string encoded by system encoding.
+Add decoding: system() returns raw string encoded by system encoding.