* feat(regional): Auto state wise taxation for GST India
* fix: Update gst category on addition of GSTIN
* fix: Codacy and travis fixes
* fix: Travis
* fix(test): Update GST category only if GSTIN field available
* fix: Test Cases
* fix: Do not skip accounts if place of supply is not present
* fix: Auto GST taxation for SEZ Party types
* fix: Automatic taxation for multi state
* fix: Codacy and travis fixes
* fix: Auto GST template selection in Sales Order
* fix: Move inter state check and source state to tax category
* fix: Remove unique check from tax template
* fix: Remove unique check from tax template
* fix: Address fetching logic in Sales
* fix: fecth tax template on company address change
* fix: fetch company gstin on address change
* fix: company_gstin set value fix
* fix: Mutiple fixes and code refactor
* fix: Add missing semicolon
* fix: Company address fetching in sales invoice
* fix: Remove print statement
* fix: Import functools
* fix: Naming fixes and code cleanup
* fix: Iteritems compatibility for python 3
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