* Add subscribe for Free Subscription Requests
* Various improvments

same as f310c561

+ store all ERP5 configuration parameters in the local setting DB.

Do not handle solving issues in Workflow_statusModify, use directly script attached to the
dialog of solving divergence. Also, previous code was no longer working properly with latest
simulation

Depending on the dialog's parameters, the script might get the parameter
in kw or in the request. To prevent this random use, we define it in
the parameter list

This avoid annoying messages that someone else modified the document, if the
user knows we is going to have a divergence, he should be able to use the dialog
immediately.

erp5_officejs: Updated Appcache and jioConf

This is an hardcoded behaviour of the app to allow user to manually enter the websocket url

This allows to store any arbitrary value as jio configuration.

also commit the new values on the fields "date" in proxy field libraries as
they are not automatically recomputed for now when changing config on a proxy
field

This allow to configure local properties (like language) in the browser database through jIO.

- Translate portal_type column, and move it to more columns
- remove creation_date & modification_date editable fields, they are already in the proxy field

fixup f4639fde . params['section_uid'] can be a integer

fixup 5ae7e594

and fix a typo

This column shows an icon to download the document for each document in the listbox

They are used by RSVP.js when calling the Promise.cancel method

This top gadget can be reused by any HTML5 application who want the same layout.
The configuration is done on the Web Site level with the 'WebSection_viewHateoasPreference' configuration form.

define security on the right class
use newstyle class so that slots is effective
cleanup whitespace and indentation

This reverts commit ca125dac which came
from a misunderstanding. The code does not modify or convert any date, it just
display a default timezone when creating a new object.

Also fix the date field to have a timezone property in former proxy field library