When we conditionally create new BigArray for appending data, we should create
it as empty, because in DataStream_copyCSVToDataArray() creation is done lazily
only when destination array is not yet initialized and we anyway append data to
the array in the following code block.

Creating BigArray with initial shape of appending part will result in
destination array being longer than neccessary by first-appended-chunk length
with this-way-introduced extra header reading as all zeros.

Fix it.

/cc @Tyagov

source_section -> source
destination_section -> destination

Stop use \n character as ingestion delimiter, only use for .CSV format where it's part of the structure of a file.

Clean up iterate script implementation. No need of own array property type when we can use more generic object.

Add new method that can copy CSV data to a Zbig Array.

Add a new property of type array.

Better end condition.

Allow in API to pass reference of object (i.e. Data Array) where transformation is expected to be stored.

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.