[ADD] website_forum: added new funtionality to post Articles and Discussions also on forum insted of only questions. On articles and discussions users kan post multiple reply on each post insted on only one reply per post and users will able to post reply on any other reply. in list posts will be default sorted by relevancy. show introduction message when people not logged in.
[ADD] website_forum: added demo data for article and discussion.
[IMP] improved code to use cookie instead of session to show introduction message and allow only 2 leval reply funtionality in discussion and article posts.
[FIX] account: remove orphan analytic lines

If the analytic account is not present on an entry, still removes the Analytic Journal Items linked to it.
Fixes #1194, opw 610784
[FIX] account: avoid closing fiscalyear with unpost entries

As when closing fiscal periods, forbid to close a fiscal year with unposted entries.
Fixes #1194, opw 610784
[FIX] website: repair compatibility with 8.0rc1 carousel (banner) snippets that may be present in existing pages
[FIX] website: editor: ignore spurious changes for editable content

Changes to contentEditable or attributeEditable attributes
should not cause the corresponding section to be marked
as dirty (oe_dirty). This would otherwise cause an extra
editor save() for those, wrongly marking untouched
templates as `noupdate`, and possibly triggering access
right errors.
[FIX] website_sale: too tiny quantity input (if qty > 9)
[IMP] product: name_get matching on commercial_partner_id for suppliers

The name_get of a product will use some information (e.g. default_code) based on the supplier.
The matching of the supplier should use the commercial_partner_id in case the supplier info are on the company and the partner_id in the context belongs to the company (e.g. creates quotation with a contact of the company).
Fixes #1219
[FIX] account_analytic_analysis: invoiced field takes customer invoices only

Besides, it subtracts customer invoices with customer refund invoices
[ADD] contribution files and image removed at 2ad092b
[FIX] auth_oauth: fb and google oauth providers reset on general settings apply

 - The res_config.xml file was missing in the manifest (so couldn't check the use of FB and Google OAuth from the general settings)
 - The default value for these oauth configuration were not set
[IMP] website: add snippet for floating picture
[IMP] ir_qweb: allow to display a datetime like a date
[FIX] sale_order_date: requested_date editable in `sent` state
[FIX] barcode interface: a lot of deferred were not correctly returned
[FIX] ir_attachment: restrict access to orphan attachments to employees
[MERGE] forward port of branch 7.0 up to eb9113c
[MERGE] forward port of branch saas-3 up to 77500e5
[FIX] web: manual update of select2 lib to 3.5.1 version

The previous version of the lib seemed to be in an inconsistent state.
This fix the select2-offscreen class when the page is larger than
10 000px (this situation happens when importing a file with lots
of column).