title: package_data files with executable permissions
body: <p>I am using distutils to create a Python (2) package installer. In my package are a couple of binary executable that get called from my Python code. I am listing these as <code>package_data</code> in my <code>setup.py</code> file so they get installed along with the package. However, distutils does not copy the executable permission bit on these files when they are installed. Is there a way to force distutils to install <code>package_data</code> files with executable permissions?</p>