Revert "Scrolling map caches scaled image on scale change"

This reverts commit 9f5334b09e8b3ec92c3f7328ef1dbd8510becc9b.
Merge branch 'master' into better_dungeon_generator
Allowing farther zoom out
Smaller room placeholders will not be overlaid
Adding a naive algorithm for generating a relative neighborhood graph
Dungeon generator uses the relative neighborhood to dig paths