[FIX] account, bank statement reconciliation: fixed huge bugs when using tax with several children or when debit/credit are 0 but some amounts have to be put in a tax code + improved usability by adding domains where needed

product.product reuses most of the product.template views however some parts need to be excluded or replaced.
Instead of adding template only parts in base view and removing it for product, split the views in 'common' (product_template_form_view), 'template only' (product_template_only_form_view) and 'product only' (product_normal_form_view) where the first is inherited by the other two. The attribute mode='primary' on both second views allows to make sure that future inheritance of product_template_form_view and product_template_only_form_view will work with the full rendered product_template_form_view view.
This allows us to have valid buttons in crm for bill of material (filters based on active_id).
Also cleaning the mess with circular dependencies.

[FIX] web: update bootstrap to version 3.2.0.
[FIX] website.seo can't edit title and description; website.editor change link for internal page
[IMP] website editor: remove button style from cke and insert into the link dialog box.

There's a big risk of mistake with the fast-create
feature and they don't need it

(Rebase of PR #1073)

[FIX] purchase_requisition: converting the date into datetime using the timezone of the requisition's responsible

[FIX] website_forum: fix answers display order (correct, then votes, then write_date)

[FIX] purchase_requisition: use fields.date.date_to_datetime() to convert date into datetime... which simply makre sense

(Rebase of PR #1057)

(Partial backport of commit 1f861569)

Closes #800.

[FIX] #1065 display_name does not display the address

[FIX] website: enumarate page raise an exception if query_string is not null; Can't create a page with the modal link editor

[IMP] website editor: remove button style from cke and insert into the link dialog box. Fix the dialog box label value when the user create a link.

[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

The emails containing emails generated with the image widget have absolute path (src='/website/static/...'), adding <base> tag allows the mail client to load it correctly.