Update computer-aided_design.yaml

src/computer-aided_design.yaml

 unit: Computer-Aided Design
 unit_id: 3d_scanning_and_printing
-version: 2018
+version: 2019
 tasks:
 - name: Computer-Aided Design
   description: |
     * Model (raster, vector, 2D, 3D, render, animate, simulate, ...) a possible [final project](http://fab.cba.mit.edu/classes/863.14/people/), 
       and post it on your class page.
-    > Don't rely on a printed document. Check the information for each assignment in this living document each week.
   outcomes:
   - Evaluate and select 2D and 3D software
   - Demonstrate and describe processes used in modelling with 2D and 3D software