Fix the overall map in item frame issue.

Maps were sending to everyone in the world regardless if they were near the itemframe that contains a map.
This was causing the rendering code for markers to run excessively, with very noticeable impact on large servers.

This patch will also remove the markers from the maps, which was the primary source of the lag all together.

We will now only send maps to entities that are in range of of the map, without markers, at a configurable rate.

This should fully end the issues with them.