fix BC and material.yaml to work again

examples/mesh/material.yaml

@@ -23,6 +23,11 @@ phase:
         xi_inf_sl: [63e6]
 
 material:
+  - constituents:
+      - O: [1., 0., 0., 0.] # dummy material
+        v: 1.0
+        phase: Aluminum
+    homogenization: SX
   - constituents:
       - O: [0.12807292351503236, 0.22200469518411023, 0.6352813278477609, -0.7285114110750144]
         v: 1.0

examples/mesh/tensionZ.load

@@ -2,8 +2,12 @@
 $Loadcase 1 time 0.0005 incs 1 frequency 5
  Face 1 X 0.01
  Face 2 X 0.00
+ Face 2 Y 0.00
+ Face 2 Z 0.00
 $EndLoadcase
 $Loadcase 2 time 10.0 incs 200 frequency 5
  Face 1 X 0.01
  Face 2 X 0.00
+ Face 2 Y 0.00
+ Face 2 Z 0.00
 $EndLoadcase