Test suite modernization

tests/demo/screens/navigation_screenshot.py

@@ -0,0 +1,18 @@
+# navigation_screenshot.py - Take screenshot of navigation demo
+import mcrfpy
+from mcrfpy import automation
+import os
+
+# Change to the correct directory for the demo
+os.chdir(os.path.dirname(os.path.abspath(__file__)))
+
+# Run the navigation demo
+exec(open('navigation_demo.py').read())
+
+# Take a screenshot after a brief delay
+def take_shot(rt):
+    automation.screenshot('../screenshots/navigation_demo.png')
+    print('Screenshot saved!')
+    mcrfpy.exit()
+
+timer = mcrfpy.Timer('screenshot', take_shot, 500)