Merge pull request #106 from AnyBody/missingStlFix

fix missing stl file when downloading the demo model

Author: melund

A_study_of_studies/Downloads/arm2d.zip

@@ -249,7 +249,7 @@ functionality in an AnyBodyStudy.
 
 We need a model with a bit more substance than the template we created
 above. If you do not already have our trusted arm model stored
-somewhere, {download}`please download it here <Downloads/arm2d.any>`, save it to your disk, and load it
+somewhere, {download}`please download it here <Downloads/arm2d.zip>`, save it to your disk, and load it
 into AnyBody.
 
 :::{rst-class} without-title

A_study_of_studies/intro.md

@@ -2,7 +2,7 @@
 
 In this lesson we are presuming that you have the arm2d.any file loaded
 into AnyBody. If you do not have the model on file, please download and
-save a copy from this link: {download}`arm2d.any <Downloads/arm2d.any>`. It should look like this when
+save a copy from this link: {download}`arm2d.any <Downloads/arm2d.zip>`. It should look like this when
 you have loaded the model, run InitialConditions operation, and opened a
 Model View:
 

A_study_of_studies/lesson1.md

@@ -31,7 +31,7 @@ the dynamic equilibrium equations for a equal amount of unknown forces,
 the so-called reaction forces.
 
 To conclude this tutorial, please try InverseDynamics operations in the
-arm model, {download}`arm2d.any <Downloads/arm2d.any>`, and the slider crank
+arm model, {download}`arm2d.any <Downloads/arm2d.zip>`, and the slider crank
 mechanism,
 {download}`demo.SliderCrank3D.any <Downloads/Demo.SliderCrank3D.any>`. In both
 case, you will now see forces being calculated, i.e. forces that are