add Foldable test (from examples.TODO)

Author: Wim3000

testXourses.TODO/foldableTest.tex

@@ -0,0 +1,12 @@
+\documentclass{xourse}
+
+\title{Master Foldable and Expandable Test Xourse}
+
+
+\begin{document}
+\maketitle
+
+\activity{testFiles/foldableEnvironments}
+
+
+\end{document}