Log Message:
Update to 3.5.1:

TortoiseHg 3.5.1

TortoiseHg 3.5.1 is a regularly scheduled bugfix release.

Bugs Fixes

    visdiff: preserve the executable bit after editing a file

Installer

    setup: exclude setup.py and distutils from py2exe build
    wix: add mercurial/help/scripting.txt (fixes #4264)