Added map locations for Imp Statue Seals. (Resolves #258)
Created a custom map icon for Imp Statue Seals.
Fixed incorrect boss drops linking for two Ulcerated Tree Spirits (Capital Outskirts and Leyndell). Both had been linked to the latter's Golden Seed, and the latter had also been linked to the bell bearing dropped by the UTS in Giants' Mountaintop Catacombs, meaning all three of them were inadvertently linked together. (Fixes #264)
Small corrections in flasks.yaml and talismans.yaml.