Merge pull request #6 from jttorate/master
1. Added validator class
2. Added validations for sku
3. Added fixtures
4. Added test file for sku
1. Added inarraykey validation in sku module
2. Updated sku test file
3. Added initial uploading of sku
1. Added batch upload models
2. Added sku import form
1. Finish batch upload of sku. Next step is to use queueing
1. Added ampf library
2. Added background worker
3. Updated sku upload
1. added initial create,increase,decrease,move method for inventory
2. Added initial test file
removed test file
uom and zone are now required
1. Updated create inventory
deleted upload files
-- add import poi in worker command
-- add try catch in delete function as foreign key validation
-- create poi uploader & add custom data validation
-- update sku uploader & add custom data validation
-- add other model validation
-- add custom data validation in all custom create fields