Needs itself to renerate de PDF documentation.

--- docs/userguide/genuserguide.py.orig	Wed Mar 26 21:17:14 2014
+++ docs/userguide/genuserguide.py	Mon Jan  4 13:20:01 2016
@@ -8,7 +8,8 @@ This module contains the script for building the user 
 """
 
 def run(pagesize=None, verbose=0, outDir=None):
-    import sys,os
+    import sys,os,site
+    site.addsitedir("${WRKINST}${MODPY_SITEPKG}")
     from reportlab.lib.utils import open_and_read, asUnicode
     cwd = os.getcwd()
     docsDir=os.path.dirname(os.path.dirname(sys.argv[0]) or cwd)