Created Sales ext which includes some new orms:
- IncidentCustomer with extension to reference customer
- OpportunityCustomer with extension to reference customer
- ToDoCustomer with extension to reference customer
- ProjectCustomer with extension to reference customer
and Extend Account to include reference to Customer.

Modified CRM ext to extend customer to include account relation.

Modified customer orm to create CustomerGroup and CustomerGroupCustomer orms.
Merge pull request #19 from xtuple/master

catch up.
issue #18861: first use of compound privileges in orm
issue #18861: added compound privileges to all applicable orms
issue #19129 create sales ext, modify crm and project crm extensions, modify customer orm
* Add customer group and customer group item to the existing customer orm file.
* Create a "sales" extension orm file that does the following:
  - Extends CRM Account to include a reference to customer
  - Add customer document orms for Account, Contact, Incident, Opportunity, To-Do and Project (i.e. ContactCustomer, ToDoCustomer etc.)
  - Extend the orms above to include the toMany relationships for the corresponding customer document.
* Modify the CRM extension so it will additionally
  - Extend Customer to include Account property
  - Extend Customer to include ContactRelations, IncidentRelations, OpportunityRelations and ToDoRelations
Merge branch 'master' of github.com:xtuple/database into 19129
incident #19129 - extend Customer - add contactCustomer, incidentCustomer, opportunityCustomer, toDoCustomer, and projectCustomer columns to Customer orm in crm ext
issue #18406: Add special support for checking account used
Merge pull request #211 from jrogelstad/18406

issue #18406: Support for deleting records.
Merge pull request #20 from xtuple/master

Catch up.
Merge branch '18861'
issue #18661: Update submodule.
Merge pull request #212 from jrogelstad/master

issue #18661: Merge to master.
issue #18406: update submodule
Merge pull request #213 from shackbarth/18406

issue #18406: update submodule
Merge branch '19129'
Merge pull request #21 from xtuple/master

Catch up.
Merge branch 'master' of github.com:jrogelstad/database
issue #18983: moved out ext orms
issue #18983: updated name of priv