Add readme

README.md

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+# Recipes for Engineers
+
+Store recipes in a nerdy JSON tree format and use that to generate [Cooking for Engineers]()-style tabular recipe cards in HTML.
+
+Right now this project is just a set of scripts.
+
+## `make_tree.py`
+
+This is a fairly naive script that walks you through the process of turning a recipe into a tree structure. It has you list out ingredients, and then add tasks to perform on those ingredients. You end up with a tree that is something like this:
+
+```
+shake and grill for 20 more mins
++-- grill for 20 mins
+    +-- wrap in foil
+        +-- season to taste
+            |-- salt and pepper
+            |-- dice
+            |   |-- rosemary
+            |   |-- thyme
+            |   +-- basil
+            +-- lightly coat
+                |-- olive oil
+                +-- chop into quarters
+                    +-- red potatoes
+```
+
+Leaves are raw ingredients, other nodes are tasks. The tree is output to a JSON file.
+
+## `output_html.py`
+
+This script takes that JSON file and does a recursive depth-first search to render an HTML-table-based recipe card.