update links and deps class01

Author: andrewrosemberg

class01/Manifest.toml

@@ -10,6 +10,7 @@ ImageEdgeDetection = "2b14c160-480b-11ea-1b58-656063328ff7"
 ImageFeatures = "92ff4b2b-8094-53d3-b29d-97f740f06cef"
 ImageIO = "82e4d734-157c-48bb-816b-45c225c6df19"
 Images = "916415d5-f1e6-5110-898d-aaa5f9f070e0"
+Ipopt = "b6b21f68-93f8-5de0-b562-5493be1d77c9"
 JuMP = "4076af6c-e467-56ae-b986-b466b2749572"
 MarkdownLiteral = "736d6165-7244-6769-4267-6b50796e6954"
 MetaGraphsNext = "fa8bd995-216d-47f1-8a91-f3b68fbeb377"
@@ -23,3 +24,4 @@ ShortCodes = "f62ebe17-55c5-4640-972f-b59c0dd11ccf"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Symbolics = "0c5d862f-8b57-4792-8d23-62f2024744c7"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
+Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"

class01/Project.toml

@@ -6,6 +6,7 @@ using InteractiveUtils
 
 # ╔═╡ f0c826c7-b2e3-4dbf-b29d-37623aa4d7c6
 begin
+	class_dir = dirname(@__DIR__)
 	import Pkg
 	Pkg.activate("..")
 	Pkg.status()
@@ -77,7 +78,7 @@ begin
 	    return uniq
 	end
 
-	img  = load("layout.png")
+	img  = load(joinpath(class_dir, "layout.png"))
 	gimg = Float64.(gray.(Gray.(img)))
 
 	_edges = detect_edges(