script to clean up example builds

examples/clean.py

@@ -0,0 +1,11 @@
+"""Script to remove build/ directories from all examples.
+"""
+import os, shutil
+
+examples_dir = os.path.dirname(os.path.abspath(__file__))
+
+for d in os.listdir('.'):
+    build_dir = os.path.join(examples_dir, d, 'build')
+    if os.path.isdir(build_dir):
+        print("Removing {}/build".format(d))
+        shutil.rmtree(build_dir)