The Restler API Explorer shows the classes in the order they are added
and it's a mess if they are not sorted.

Replace the GenericApi class by two classes, Login and Status, else the
endpoints would be /generic/login and /generic/status.

Remove several /thirdparty/list/xxx endpoints because they are redundant
with the /thirdparties/ endpoint whith the 'mode' filter.
Remove the customer/byemail/{email} endpoint because it is redundant
with the /thirdparties/ endpoint whith the 'email' filter.
Remove all the /customer/ endpoints because they do the same thing as
the corresponding /thirdparty/ endpoints.

Remove the /thirdparty/{socid}/order/list endpoint because it is
redundant with the /orders/ endpoint whith the 'societe' filter.

Added some FIXME:
 - the put() method does its job but the API returns an error 500
 - delete() does not work.

Rename the 'mode' parameter to 'status' in GET /invoices.
Fix the error handling in DELETE /invoices/{id}.

Remove several /category/list/xxx endpoints because they are redundant
with the /categories/ endpoint whith the 'type' filter.

Simplify the code that looks for the API classes and replace the
/contact/ and /user/ APIs by /contacts/ and /users/.

internationalization of code comment

international comment for code

FIX bug with PgSQL on GROUP BY missing column

update from upstream