Some map fixes, calassa bridge fixed and removed Nahlesar

- Removed NPC Nahlesar from map {x = 32359, y = 32233, z = 7} partial fix from #423 still need to delete file from NPC folder
- Fixed some bugs reported on #323
- Removed trash and corpses from this tomb: {x = 33026, y = 32710, z = 6}
- Removed trash and corpses from this cave: {x = 33176, y = 31015, z = 7}
- Added missing mountain on {x = 33145, y = 31015, z = 8}
- Added missing water above this cave {x = 33176, y = 31015, z = 7} causing user to see the upper floor
- Fixed sign text at {x = 32273, y = 32265, z = 7}
- Added water where user used to see black squares around here {x = 32243, y = 32250, z = 7}
- Removed house items from missing house at {x = 33479, y = 31302, z = 9} ref to #302
- Fixed bridge to calassa at {x = 31915, y = 32716, z = 6} and {x = 31914, y = 32716, z = 6} #376
- Changed all beholder occurrences into bonelord