update docs

docs/source/conf.py

@@ -12,7 +12,7 @@
 #
 import os
 import sys
-sys.path.insert(0, os.path.abspath('../../src'))
+sys.path.insert(0, os.path.abspath('../../pylib'))
 
 # If true, the current module name will be prepended to all description
 # unit titles (such as .. function::).