[IMP] hr, hr_*, project, sale, sales_team, stock: in dashboards, add color picker, add domains on reports and style improvements

[ADD] account, account_voucher, mrp, purchase, stock : new mobile-friendly kanban for one2many in form view

[ADD] account_online_sync and account_plaid: automatically sync your bank accounts using plaid interface, through a cron job

[ADD] account_check_writing and l10n_us_check_printing: payments by checks based on account.payment object. (let's pop the champagne Fabrice :-) )

DateTime insert data in UTC, constrain is in the timezone of the server.

+ remove js from account_invoice_view

this closes #277

Various cosmetics and traceback fixes

[FIX] account: fix transfer_account in settings + create sale/purchase tax template for l10n_generic_coa

[FIX] account: add constraint to ensure that receivable and payable account are reconciliable + fix l10n_be CoA

This commit introduces a new view type, the timeline view. This view is
intended to display messages like the previous chatter. This is now a view
like the form or list view. Like other views it will be possible to have
custom templates for some specific needs, allowing customization.

[IMP] mail: the value tracking is modified. Previously messages were created
containing the modified values. Those values are now stored, using a new
model mail.tracking.value. The message body is dynamically build based on
the values. Tests have been updated.

This version is temporary. Indeed two main modifications will come in a short
future :

 - the new design will improve the display
 - the slack mode will change the way the Inbox and notifications are managed

All glory to the Hypnotoad.

Special thanks to Valerie Pirenne (vpi), Jerome Maes (jem) and Richat Mathot
(rim) that did not code but said a lot of things. Martin Trigaux (mat) did
nothing, a bit like for the slides modules, but he is busy sending emails.

[FIX] website_livechat: Pass correct name of class in super method to solve traceback on publish button

Now,
- event contains the HTML badge fields and the report (and report templates) to print badges
- event_sale add the ticket type on badges
- website_event allow the edition of badge throught website editor.
When the editor will be available in backend, event will be allow to edit badge report, so the action should be moved from website_Event to event module.

[IMP] account: set the date_maturity field on account.move.line as required for the sake of being more explicit, and having the aged receivable/payable reports that work

[IMP] account, account_reports, account_batch_deposit : improve kanban dashboard view to fit with new design

[REM] web_kanban_sparkline: module and dependencies (project, sale, sales_team, stock, mass_mailing)

The module was not used anymore.

[FIX] account, dashboard: wrong figures for graph and amounts in bank journal kanban box if there were several statements on the same day

mismtach.

more menu action linked to an email template.

[TESTS] mail: added a test for this method.

This reverts commit 6c0376e9.
It turns out that this javascript code was not unused after all.
(see kanban view inside customers, clicking on them should open the
contact in a popup)