Fix double-height flowers in flower garden landmark

Make the flower garden more interesting with many more types of flowers,
and fix the double-height ones to have the correct top part.
Make decodeDungeonInfo match the upstream
Correct typo in description

Correct typo (Kight -> Knight)
Add new landmark and fix render bugs

Add 'Well' landmark to thunts
Fix cottage floor rendering bug
Correct typo in chestlocdesc causing v1.8 incompatibility
Merge remote-tracking branch 'upstream/development' into development

Conflicts:
	utils.py
Merge pull request #236 from sshipway/development

Add 'Well' landmark, fix 'Cottage' landmark and 'FlowerGarden' landmark