Add tools to automatically extract documentation

tools/extract_doc.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+
+import sys
+
+filename = sys.argv[1]
+
+if filename.endswith('__init__.py'):
+    sys.exit(0)
+
+package_name = filename.replace('/', '.').replace('.py', '')
+sys.stdout.write('**%s**' % (package_name))
+sys.stdout.write('\n\n')
+# sys.stdout.write('-' * len(package_name))
+# sys.stdout.write('\n\n')
+
+sys.stderr.write('\tExtract doc from %s\n' % (filename))
+
+with open(filename) as infile:
+    copy = False
+    for line in infile:
+        if line.strip() in ['"""', "'''"]:
+            if not copy:
+                copy = True
+            else:
+                break
+        elif copy:
+            sys.stdout.write(line)
+
+sys.stdout.write('\n\n')