* This commit should be rebased before be really released.

SaleOrder_viewConfirmAsWeb is a duplication of SaleOrder_viewAsWeb

Enable SaleOrder_isShippingRequired implementation
Optimize SaleOrder_isShoppingCartEmpty

We use field instead to present such information.

- SaleOrder_viewAsWeb (previously SaleOrder_viewDetailAsWeb) is now the SaleOrder_view in web mode, where it is used to view the previous Sale Orders informations.
- WebSection_viewShoppingCart is now the shopping cart (previously was calledSaleOrder_viewAsWeb)

- Introduce improvements on current forms in meanwhile.

Fix name convention on forms and use login_form instead register section for request the user login.

- Removed unused code which has no meaning to keep (Just ramdom scrips)
- Moved to erp5_commerce_paypal_legacy code only used by PayPal Legacy related code.

Those forms are been not used or not working

This code is considered as legacy because it is not yet compatible with SecurePayment and it is implemented with "Express Checkout" in mind which is not
suitable for all web sites that intent to use Paypal.

Use web_view instead a web section to view person information
Simplify Person_viewAsWeb and drop usage of websection
Updated Persion_editPersonalInformation (Done by JP mostly)

Use SaleOrder_viewAsWeb instead ad-hoc name.
For e-commerce, we do not allow user edit his own order on web mode.

Use erp5_ui_short cache on Products List

The layout was moved to appropriated business template

erp5_commerce should only contains core implementation and nice widgets for implement erp5_commerce.

Consider that view is the default is wrong, we should invoke call on the object, this change fix listboxes used on frontpage of a website.

Reference should be used for internal purpose (map with PayPal for example) and Title should be a fashionable name.

Make ID editable (by Manager) since this is useful quite often to prepare a business template with initial data of an ERP5 site. Items are ordered in a way which is similar to DMS.

Sale Order and Sale Order Module should have a default web view in an online shop.

Also improved comments and docstring including TODO.

Also improved comments and docstring including TODO.

Also improved comments and docstring including TODO.

Also improved comments and docstring including TODO.

Also improved comments and docstring including TODO.