Rolling update to 0.7.3 and new server

After a couple of days testing the new release, we decided to launch the rolling update of all sims. We take this oppportunity to move them all on a new, more powerful server.

The update process has been prepared so that it will take only a few minutes for each sim.

We found out the 0.7.3 release was working pretty well, we only found one bug with a NPC function. Not enough to stop march of progress. (I will just have to wait a little bit before deploying the amazing outfit vendor I am working on).