updated readme to point to correct production server URL (for https anyway)
updated readme to point to correct production server URL (for https anyway)

concord-consortium/jsmol-models,rishiloyola/jsmol-models,concord-consortium/jsmol-models,concord-consortium/jsmol-models,rishiloyola/jsmol-models,concord-consortium/jsmol-models,rishiloyola/jsmol-models,rishiloyola/jsmol-models,concord-consortium/jsmol-models