erp5_accounting : preferred ledger form field only displays ledgers defined on accounting transactions types. The field doesn't shows up if no ledger is defined nowhere

erp5_core: new stock.ledger_uid column taken into account in Resource_zGetInventoryList and Resource_zGetMovementHistoryList

A new column ledger in the stock table and some related keys
(stored in erp5_mysql_innodb_catalog) have also been created
Adds tests for inventory queries based on ledger in testInventoryAPI

erp5_accounting, erp5_payroll: init scripts for accounting types now call a generic Delivery_init first

erp5_base: adds a Delivery_init script to set up a default ledger on new objects which portal_type inherits from "Delivery Type"

erp5_core: changes portal type filter on dynamic_class_generation_interaction_workflow and base_type_interaction_workflow to a portal group filter

These workflows now apply on every type belonging to the grouping type 'type_definition': Base Type and other portal types of portal types

ERP5Type: introduces 'type_definition', a grouping type to identify portal types defining other types

ie: Base Type and portal types of portal types

erp5_accounting,erp5_project,erp5_payroll: changes type of main Accounting and Task documents to Delivery type

For the moment it only allows to define a list of ledgers
on the portal types inheriting from it, to create a filtered
list of ledgers allowed on the final objects.

It allows to set up the default ledger on these documents too

New accounting documents belong to some "ledger/accounting/X" category
  if such is defined in the accounting preferences.
Accounting views of some documents now include a ledger.
_viewAccountingTransactionList forms can filter on preferred ledgers.

Which was related to an older version of the simulation

For example, Python Scripts were:
- dirty in the imported BT (causing all of them to be reinstalled on upgrade)
- compiled to return None

When a currency exchange line is (in)validated, we need to reindex the currency exchange
cells that acquire validation state from the currency exchange line.

This allows defining an exchange rate without end date

https://codemirror.net/demo/activeline.html