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

In web_planner, changing pages would take more and more time after
a few clicks if autoresize was called on textareas. Every time we
would change page, autoresize was called on all textareas and added
an additional textarea for each one, doubling the amount on each page
change.
The autoresize function in dom_utils was checking too shallowly for
duplicates and created a new textarea where autoresize would again be
called upon on a later stage.
This commit fixes both problems.