regen stls and update docs

TODO.md

@@ -7,9 +7,11 @@
 - Clean up `sharedVariables.scad`.
 - Parallel builds with cli tool. 
 - Beef up rack-mount designs.
+- Make handles.
 
 ### Ideas
-- Start using matrices for transformations. Enforce strict local/global hierarchy of matrix transformations.
+- Start using matrices for transformations. Enforce strict local/global hierarchy of matrix transformations. (Kinda done)
+- GitHub CI for OpenSCAD stl building
 - Instead of using names like 'mainRailSlotToInnerYZFace', experiment with a central distance/dimension directory. Like:
 ```openscad
 // Define identifiers:

rack/sharedVariables.scad

@@ -1,5 +1,7 @@
 include <../config/common.scad>
 
+// TODO: This rather unweildy config file is the result of multiple lazy and forgetful refactors. Clean it up.
+
 // Main rail variables:
 
 /* Small horizontal planes at the top and bottom of the main rails. Used so we can fasten the rail to the frame