Add docs.

doc/user/project_settings.rst

@@ -314,3 +314,18 @@ and task runs, use this section to delete the project.
 
 .. note::
     Only projects without results can be deleted.
+
+Transfer project ownership
+==========================
+
+You can transfer the project ownership to another user in the PYBOSSA server.
+
+For changing the ownership, just add the email of the user that you want to make
+the new owner. 
+
+.. note::
+    If your are not an admin of PYBOSSA you cannot undo this action, and you will
+    not be able to modify/change settings of the project as you will not be the 
+    owner anymore. Admins however can change the ownership always.
+
+