Merge remote-tracking branch 'origin/feature-120-cell-index' into feature-120-cell-index

docs/manual_index_ideas.md

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+# Indexing manually ideas
+
+- a list of all the faces (and maybe dodecahedra) which lets me assign
+  labels to them and lights up the interface
+
+- where faces / vertices are repeated in the table, assigning a vertex in one
+  spot changes it everywhere else
+
+
+
+separately - take the links generated by this codebase and apply them to
+the d3.js forcemap code I wrote for the 24-cell