- Add VERSION file, which contains just the version number of the release
- Add WHATSNEW, which is a short summary of the new release
- Add release.php which bumps all the necessary version numbers in files
- Update package.php so that the version numbers aren't hardcoded
- Add news entry for 1.7.0
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@935 48356398-32a2-884e-a903-53898d9a118a
