Implement watching static files

lib/debug.py

@@ -0,0 +1,19 @@
+from glob import iglob as glob
+from itertools import chain
+
+from tornado.autoreload import watch
+
+
+# yo dawg, we heard you like generators, so now you can generate generators
+# with generators
+def _static_files():
+    return chain.from_iterable(
+        glob(pattern) for pattern in (
+            'static/*.js', 'static/*.css', 'templates/*htm?'
+        )
+    )
+
+
+def watch_static_files():
+    for file in _static_files():
+        watch(file)