nice to see the work on BigSitemap continuing. I'll try to cherry pick my changes. Let's start with this little nice one:
I don't see any advantage of using jeweler, so let's get rid it and save lot of code. Just make use of 'native gem native for gem maintenance. Use gem build to package and gem push to release
Get rid of jeweler, 'native' gem is as nice too. Saves lots of code.