[ADD] Add partner_supplier_information module: It allows to add some specifics fields just for supplier

Port of https://code.launchpad.net/~savoirfairelinux-openerp/partner-contact-management/partner-contact-management-base_contact_add_partner_supplier_information/+merge/204046

Previous reviews:
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Romain Deheele:


> Hello,
>
> code review : LGTM.
> 
> Would it not be better to place these new fields in a new tab?
> 
> Regards,
> 
> Romain


@yvaucher:

> It seems very specific, I'm unsure this should be part of community modules.
>
> Who could reuse this module?
Could you add a comment on the reason of this condition?