[IMP] Updated website urls on modules and info page
[IMP] expl p
[IMP] doc/howtos/backend: improve exercises on relational fields
[FIX] Survey: typo (en_US wording)
[FIX] website_forum: fixed comment unlink action :
- fixed call to a wrong method
- fixed button display, now based on the standard way of managing karma (popup when
not having the required karma)
- fixed button display karma computation
- some css tweaking for this button
[FIX] website_event: pager now takes into account the searches performed
by the user. Otherwise it was resetting the search to all events.
[FIX] res_partner: Meetings button on form view was not correctly
filtering displayed meetings according to the selected partner.
[FIX] language and model converter redirections should use code=301
[FIX] stock: moves link on product form opening wrong view

Fixes #2008
[IMP] doc/howtos/backend: add section on wizards
[FIX] portal_sale: portals are not allowed to see payments

Portal users are not allowed to read account.move.line model
Therefore, in the portal, if you let the payments in the invoice view, the portal user is warned that he is not allowed to see account.move.line
[IMP] Increase statics cache from 12 hours to 1 week
[FIX] im_chat : fix the im_search method
[FIX] bus, im_chat : disabled realtime status notification, replace it with rpc calls and set random retry delay on bus (longpolling)
[FIX] account: several fixes in bank statement reconciliation related to multi-currencies use cases where the statement is a foreign currency but receive a payment in the company currency
[IMP] website_*forum,blog,instantclick,...: Move Js in assets
[FIX] survey: in prepare_result, result_summary variable could be returned without being initialized (error in question.type maybe, but anyway should be more secure)
[FIX] website_forum: fixed (un)publish management on the profile. Partners are now also published by default. Better protection of displayed profile: only publis profiles with karma >= 1 are displayed on the forum, to avoid allowing external users to browse the user lists. Some cleaning / improvements in the bio edit form that was a bit buggy.
[FIX] [IMP] mail: fixed mail sent to users being redirected to their partner profile
leading to potential issues.

Now the behavior is back to its previous version, posting on the user creates a private
discussion. Fixed management of model variable in message_post to avoid posting messages
on the mail.thread model.

Classic inbox writes on partner, with hr it writes on the employee profile, like previously.
[IMP] doc/howtos/backend: fix calendar view, improve search view, fix copy()