Add "--version"
Update names to match convention
Format
Use absolute import
Remove executable bit
Do diff in correct order
Remove unused class
Allow specifying include paths on command line

I never found the "siteheaders" thing useful.
Use a nicer metavariable
Simplify
Make "--include-path" work when run elsewhere
Add missing file
Simplify
Remove "siteheaders"

This fixes #5.
Document "--include-path"
Avoid swallowing errors
Increment patch version to 0.1.1
Put this on PyPI for easier installation
Add URL
Update information