Little green men on minimap: step 1

I've committed the initial code to show the green dots on the minimap - so starting from r1874, you might to some extent enjoy the minimap functionality.

Note, that if you move to the neighbouring region or logoff, the minimap does not update (yet).

This is because at this moment I do not trigger the update on these events - I will fix that in the nearest days.

Avatars facing east: partially fixed

I am very happy to be honored with the commit access for the opensim (thanks guys!), and my first contribution was a relatively small bugfix for the avatar rotation problem - even though it is partial.

Now the rotation of the avatars is correctly shown, however the updates happen only when the avatar is walking - this required minimal code changes, and for fixing it for "in-place" rotation, I'd need some more discussion. But hey - you are no longer forced to face east, so it is a good first step, I think :)

Along with that went a small safety patch for the CLI - there were multiple occasions where the exception in the CLI (relatively harmless on its own), caused the entire sim to shutdown. Now it only prints the error message.