Fixed a bug for which if an approach point is in an unassigned area mark_doors crashes
Added a tool to merge location files so that you don't have to annotate everything in one go. Also added a very small test map, that may be useful to avoid generating MB in location files
Changed mark_locations to show the area of locations already assigned in the destination file, if it exists
Merge pull request #9 from mleonetti/master

Added a couple tools to handle maps, and created doors and location files for all doors and locations in simulation