Include docstring tests as part of documentation.

setup.py

@@ -4,6 +4,14 @@ name = "slapos.rebootstrap"
 
 long_description = open("README.txt").read() + '\n\n'
 long_description += open("CHANGES.txt").read()
+long_description += """
+Technical documentation
+=======================
+"""
+import glob
+import os
+for f in glob.glob(os.path.join('slapos', 'rebootstrap', '*.txt')):
+  long_description += '\n' + open(f).read() + '\n'
 
 setup(
   name=name,