Add a generic implementation of a script able to iterate effectively over a Data Stream and do transformation on data itself.

Wendelin is a Big Data platform based on ERP5.
More information can be found at http://www.wendelin.io/

Current repository contains following:

    * bt5/      - contains the generic ERP5 Business Templates needed to
                  setup Wendelin on top of ERP5
    * product/  - Wendelin file system product
    * slapos/   - SlapOs setup recipe
    * tests/    - test definitions for Wendelin platform

Wendelin is a Big Data platform based on ERP5.
More information can be found at http://www.wendelin.io/

indexeddb storage locally at browser side.