Replace bup by my new version, which is *much* faster when there are a large number of projects.
Replace bup by my new version, which is *much* faster when there are a large number of projects.

tscholl2/smc,DrXyzzy/smc,sagemathinc/smc,tscholl2/smc,DrXyzzy/smc,DrXyzzy/smc,sagemathinc/smc,tscholl2/smc,sagemathinc/smc,sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,tscholl2/smc