[FIX] website: error for rendering of the sitemap template. qweb can't render the xmlns attribute.

Changed fields.date_order on purchase.order from date to datetime

[FIX] website_forum: fixed issue with user vote badly taken into account when upvoting / downvoting + crash due to wrong field name. Backport of Leonardo Donelli PR for master.

[FIX] website_sale: discount price is never hide

[FIX] models: store FailedValue in cache on log_access fields, too

[FIX] tour.js: display a wrong error message when an error is detected with phantomjs test tour

This should fix an issue discovered by tde when reading all fields on a record
on which you don't have access right:
 - _read_from_database() fetches result and store it in cache
 - read() retrieves values from cache, starting with field 'create_date'...
 - ... which is not in cache, so prefetch that field, read it, which goes into
   an infinite loop

The problem is that _read_from_database() finds out that you don't have access
on the record, and stores a FailedValue in cache on all fields... except magic
fields. Fix the problem by storing the FailedValue on all fields but 'id'.

[FIX]hr_recruitment: fix onchange_job user_id referenced before assignme...

[FIX] errors when the user click on a menu item; add menu items for product attributes

[FIX] models: wrong var used in _compute_display_name(), fixes issue #1002

fixes issue 1005

The method does not follow naming conventions. Therefore the "guessing" api
decorator picks the wrong method wrapper.

(Manual rebase of #1003)

[IMP] Crm: Add tracking mixin to manage utm campaign and add this mixin to mass_mailing, crm_lead and sale_order

[FIX] models, fields: add model dependencies for models backed up by sql views

Don't include xml declaration when compiling rST module descriptions to HTML

lxml (used by the html sanitizer) really does not like documents as unicode
strings with an encoding declaration (which doesn't make sense indeed), yet
docutils with output_encoding=unicode generates one (a stupid one too, says
"encoding=unicode").

Disable the xml declaration altogether when compiling rST module declarations
to HTML.

[FIX] fields: add a type to field Id; this fixes #990

[FIX] product: add menu item to attributes and attribute values. Adding constraint to prevent deleting attributes with references to products.

[FIX] models: reorganize model instantiation

[FIX] stock: update and request procurment button use active_id to se the product. Fix to use this buttons on product template.

Remove redundant calls to list()

Unsafe listification of weakref in Python < 2.7.4