assembly added to week4 blind dovetail joint, blender render added

Readme.md

@@ -1,9 +1,9 @@
 Subjects covered:
 
-### Get to Know a CNC
+### Get to Know a CNC - Week 1
 Hands-on with the machines. Learn how they move, how to manually control them, mounting up materials.
 
-### First Automation!
+### First Automation! - Week 2
 Walk through the entire process of creating an automation intended for assembly. Use miniature modelling (a stool) to learn design principles for CNC production, as well as the basics of CAM.
 
 * Intro to CAD/CAM
@@ -12,22 +12,23 @@ Walk through the entire process of creating an automation intended for assembly.
 * Construction Geometry
 * Profiles
 
-### Problem Solving
+### Problem Solving - Week 3
 Learn to design for, and correct problems commonly encountered in building for CNC.
 
 * Dressups
 * Coordinating double-sided operations
 * Edge-treatments and engraving
 * Surfacing operations
-* Lap Joints
 
-### Joints and Helper Objects
+
+### Joints and Helper Objects - Week 4
 Go in-depth on creating joints that can be produced on a CNC machine, and learn to use helper objects for solving tricky problems.
 
 * Dovetail joints
 * Keyed joints
 * Scarf joints
 * Mortise and Tenon joints
+* Lap Joints
 
 ### Importing Exchange Formats
 Learn to work with designs created in other software, prepping them for production by CNC machine.