vifib_open_trade shall depend on erp5_open_trade, this is logical.

Person shall have validated Open Order created. Empty one assuers, that nothing
is to do for given Person.

vifib_base configures Item portal type provided by erp5_item

There is path in vifib_open_trade which requires Accounting Period portal type.

Conflicts:
	master/bt5/vifib_upgrader/bt/revision

Use query syntax.

Hosting Subscription periodicity shall be set when there is related at least
started instance setup delivery.

Periodicity shall be set on document related with Open Sale Order Line

Confirmed Sale Order Line shall have Computer Partition.

Open Order modification is a bit more optimised.

Prove that Subscription Item periodicity is correctly defined.

Start at least *today* and if date is in day number higher then minimum amount
of days in month *rewind* and do not fast forward.

Store processed date.

Periodicity is known when service is available.

Add dates safely using DateUtils.
Round up start_date to next midnight.
In case if after rounding this date would go higher then minimum number of day
in month set it to next month beginning date.

This reverts commit 77143759.

Building is fully done in alarms, so allow them to build.

This reverts commit fc9dfc05.

Provide three parts:

 * desire to do (Person_storeOpenOrderJournal)
 * difference to apply (Person_getOpenOrderDifference)
 * apply (Person_updateOpenOrder)

It is possible to debug current state by using src__=1 parameter passed to
Person_storeOpenOrderJournal