Fixed winbot test. Didn't think about -script and .exe

See http://winbot.zope.org/builders/zc_buildout_dev%20py_270_win64%20master/builds/1149/steps/test/logs/stdio

[ci skip]

[ci skip]

distutils scripts for develoment eggs are also installed

-x means "do not install scripts" and we're doing that now.
So the test needed to be adjusted.

Upgraded version pins

This only impacts testing.
Note that
VersionConflict: (zc.recipe.testrunner 2.0.0 (/Users/reinout/.buildout/eggs/zc.recipe.testrunner-2.0.0-py2.7.egg), Requirement.parse('zc.recipe.testrunner==1.3.0'))
means you have to remove .installed.cfg. Pinning a recipe version in a 'recipe=' line isn't handy.

fix for win32 '#!"python"' vs '#!python' shebang

A pip issue prevents installation of wheels with ``.egg`` in their name...

[ci skip]

[ci skip]

Wheel support also for zc.recipe.egg

Unneeded and it just uses unnecessary resources.

Support universal wheels

Changed os.mkdir to os.makedirs to make it support nested directory creation

Signed-off-by: Bernard `Guyzmo` Pratz <guyzmo+github@m0g.net>