Feature/importexport

[ghost]

Hi guys,

I've added functionality for importing stock data with the ImportExport module. Changes include:

• New Location attribute called "code". Allows users to import data by specifying a location code
• ImportExport observer - preserves default ImportExport stock import functionality but will also import data for each location
• When importing a CSV, you can include a column called stock_location that defines which location to match the stock data to.
• Included sample CSV

See the updated README.md for more details.

[amacgregor]

I'm reviewing the changes

[seansan]

Would be great if this supports the native stock_id

I know some importers then already have support ...xtento stock import for instance already supports the stock_id column