Bonus Resources suggestions:
Apple (spawns on Plains?, Grasslands, requires Plantation)
Bamboo (could be a Terrain Feature, but Chinese people like myself eat it....,requires Farm)
Barley (spawns on Plains, requires Plantation)
Beans (spawns on ?, requires Plantation, model either based on Lima, Red/Kidney, or Black-eyed peas/ or Haricot beans)
Berry (spawns on Forest tiles, requires Plantation, model either based on Rasp/Black/Blue/or Lingonberries)
Breadfruit (spawns on Rainforest Island tiles, requires Plantation)
Buffalo/Bison (spawns on Plains/Grasslands tiles, requires Camp, note: Could be a special resource for the Cree)
Cabbage spawns on ?, requires Pastures, model based on Broccoli/Cauliflower/Cabbage/Kale)
Camel (spawns on Desert tiles, requires Pasture)
Carambola (aka Starfruit, spawns on Rainforest tiles, requires Plantation)
Cassava (aka Manioc/Yuca) (spawns in Rainforest tiles, requires Plantation)
Cereal (blob-resource, replaces Wheat)
Chicken (requires Farm)
Clay (requires Quarry)
Coconut (spawns on Rainforest Island tiles)
Ducks (spawns in lake tiles, requires Pastures?)
Durian 
(Rainforest tiles, requires Plantation)
Guinea Pig (Hill tiles?, requires Pastures?) (note: indigenous Andeans raised them as a food source)
Hemp (spawns on?, requires Plantation, )
Jackfruit (Rainforest tiles, requires Plantation)
Jambu (Rainforest tiles, requires Plantation)
Kelp (spawns on Ocean tiles next to Coast, requires Fishing Boat?)
Kiwifruit (Rainforest tiles, requires Plantation)
Llama (spawns on Hills next to Mountain tiles, Requires Pasture)
Mango (Rainforest tiles, requires Plantation)
Mangosteen (Rainforest tiles, requires Plantation)
Melon (Desert tiles next to Oasis tiles, requires Plantation)
Millet (requires Plantation)
Nuts (requires Plantation, model based on Almond/or Walnut plants)
Papaya (spawns on Rainforest tiles)
Peanut (requires Plantation)
Peat (Marsh tiles?)
Pineapple (Rainforest tiles, requires a Farm)
Pitaya (Rainforest tiles, requires Plantation)
Potato (Spawns on Hill tiles, "This is a Resource that should be available only in one place on the map, but once a City State or Civ is cultivating it, the 'idea' of the Potato can be Traded and would, for example, increase the Food output of Farms on Plains or Hills to match the output on Grasslands.") or Tubers
Rambutan (Rainforest tiles, requires Plantation)
Reindeer/Caribou (spawns on Tundra and Snow tiles, requires Pastures)
Sapodilla (Rainforest tiles, requires Plantation)
Sesame (spawns on Rainforest tiles?, requires Farm)
Shellfish (spawns on Ocean tiles, requires Fishing Boat, Note: also a blob resource, how should we visually represent it? by Shrimps? Mussels? Oysters?)
Sorghum (requires Plantation)
Squash (requires Plantation)
Teak (requires Lumber Mill)
Timber ()
Tomato (requires Plantation? or maybe Farm?)
Turkey (requires Pastures)
Yaks (spawns on Hills, requires Pastures)