Badge cleanup; more directions on running demo tracker Cleaned up badges. Also added a couple of commented out possibly useful badges: * commits different between named tag/release and head * last tagged revision (use for alpha/beta releases) Also expanded to 4 explicit command for getting and running Roundup in demo mode. Emphasized that demo mode does not require installation.

User-agent: *

Sitemap: https://www.roundup-tracker.org/sitemap.xml