Add a section on sharing.

doc/omlw2014/index.txt

@@ -113,3 +113,4 @@ from gurus on hand if you get stuck.
     theano
     pylearn2
     gpundarray
+    sharing

doc/omlw2014/sharing.txt

+.. _omlw2014_sharing:
+
+************
+Sharing code
+************
+
+* License
+* Common base object?
+* If not, important implementation that use raw ptr/shape?
+* Important, acknowledgement section on web site AND in paper about the software.