* auto.py: Handle "NEWS" and "TODO" standard files.
* auto.py: Actually install GtkBuilder *.ui files.
* auto.py: Install manpages.
* auto.py: Define __version__, so that setup.py scripts can do version
checks.
* auto.py: Automatically install Python modules in soure root directory.
* auto.py: Automatically install files in ./etc/ to /etc/.
* auto.py: Temporarily create fake *.py symlinks for Python executables
without extensions, so that they get covered by intltool-update.