Add continuum mechanics' P1 and P5 lab sessions

Change-Id: I7dfbf1169b93c93b9b182c958694faf021c2a70c
diff --git a/quad8/continuummechanics/lab/.gitignore b/quad8/continuummechanics/lab/.gitignore
index 19d0629..3f57aa0 100644
--- a/quad8/continuummechanics/lab/.gitignore
+++ b/quad8/continuummechanics/lab/.gitignore
@@ -1,2 +1,4 @@
 # Don't include compiled PDFs
 *.pdf
+# Nor generated files
+output