This commit introduce a full redesign of all JS views.  We started
basically from scratch.  The goal was to unify all the various views
under a common framework, to make them testable, to make then usable in
different conditions (in studio, or in the frontend), and to make our
lives easier.

Some important points are:
- we introduced new coding guidelines (camelCase, 80 chars width, ...)
- we have a brand new testing framework (still QUnit based)
- kanban view moved to the web addon
- calendar view (formerly web_calender) moved to web as well
- the tree view was removed
- all new code should be documented

We hope that this code is the start of a new era for the Odoo web
client, we want to have a high quality codebase, well documented, well
tested, well designed.

Work done by the framework team: mostly aab, ged, chm, dmo, qsm

The Python method `strftime` raises an error when the date is older than
01-01-1900 ("The datetime strftime() methods require year >= 1900"). If
the user mistyped the date (or was expecting 01-01-16 to be converted
into 01-01-2016), this can lead errors since the ORM uses this method
frequently.

opw-702313

When a user fills partially a date or datetime field, the system will
somehow autocomplete the value entered. For example, if the user enters
"11//11" then clicks on the Tab key, it will be completed as
"11/11/0000".

However, the year 0000 is not recognized in Python, and this causes a
crash upon saving.

opw-695035

When using the abbreviated month in the language
date format (`%b`),
e.g. `%d %b %Y`
in some languages, the parsing of the date
from this format to the database format (YYYY-mm-dd)
failed because of a dot `.` added from time to time
to the end of the abbreviated name
e.g., in French, `5 juil. 2016`

This is a bug of `moment.js` < 2.13.0,
handling badly this dot.
This is solved from `moment.js` 2.13.0,
thanks to the below revision
moment/moment@41fdb58572546740c3a840ebd36fbe9e1bcdc9cb
moment/moment#3078

Unfortunately, we cannot update this library to its latest
release in stable release of Odoo (e.g. 9.0),
as this is seen as an unstable change
(if some API changes occured in the given library)

Instead, if the parsing of the date fails with the
strict mode (meaning the date must respect the format
exactly), we perform a second pass without the strict mode,
so this dot will be ignored,
and the date can be correctly parsed.

The issue can be reproduced by loading the French language,
and setting `%d %b %Y` as date format, and then performing
an advanced search on a date field. The value of the date
in the advanced search will be empty without this revision
(for the months having more than 4 chars,
other than `mars`, `mai`, `juin`, `aout`).

Fixes #11854
opw-682534

When the user searches for date (or a datetime) in the search bar, the
suggested date can become completely wrong. For example, in the French
localization where the date format is DD/MM/YYYY, the system will search
for the date MM/DD/YYYY. This is even worse when the date is not fully
written: DD/MM could be converted to MM/DD/0000, which doesn't make any
sense. This is related to the moment issue
https://github.com/moment/moment/issues/1407.

The fix is to make sure that the input date has a correct format thanks
to `parse_value`. The latter converts the date into a fixed format.

Fixes #11876
opw-676604

Widgets and website display images or display the type with icon like pdf, doc...

Due to files renaming, some patched should be applied manually to the
correct files.
Forgot to `git add` these files when committing the forward port...