[FIX] Add context propagation for m2m list view

Fix bug https://bugs.launchpad.net/openerp-web/+bug/1279885 :
    Many2many fields in Tree views will not get translated.
    If you check the context for a name_get of a m2m field, it is passed as
    None.

Add context propagation to m2m fields in list views.
Fix translation issues when viewing a a many2many field in a Tree view.
[FIX] orm: allow unicode in inherit views with attribute

When extending a view with position='attributes', prevent crash if view contains unicode char
Fixes #706
[IMP] module: when uninstalling a module, do not redirect to a useless screen
Merge pull request #17 from savoirfairelinux/7.0-m2m-context

[FIX] view_list: Add context propagation for m2m list view

If the _rec_name field of a model is translatable, the value was not translated when displayed in a list view through a many2many field (e.g. server_action_ids on base.action.rule).
[FIX] Partner VAT Intra XML delaration: Vat number format correction

The Partner VAT Intra XML delaration needs to have the VAT number
in the format without the country code prefix.

The current behaviour was to include the country code prefix in the
report which causes an SQLException error on uploading the XML file
to the Federal goverment's website.  While the error is non-descriptive
fixing the VAT number format fixes the error.
Merge pull request #739 from apertoso/7.0-bug-vat_intra

[FIX] l10n_be: VAT number for Intra XML declaration should not contain county code
[FIX] purchase_requisition: broken procurement wkf

If a purchase requisition is created instead of a purchase order for a procurement order, the method make_po should not return the id of this requisition, as methods calling the make_po method expects ids of purchase orders, not purchase requisition ids.

Besides, on purchase requisition done or cancel, we set the procurement order accordingly, without the use of the workflow. We consider this as crappy, the proper fix should be the use of a dedicated workflow for purchase requisition, but I cannot be done in stable branches. This aims trunk/master.
[MERGE] Forward-port of 7.0 bugfixes up to 7d3453d119a80f484918842682ac5f4299d91e7b