[FIX] point_of_sale: correct call to default value

The default value should be called with a lambda otherwise the payment_date is set to the date the server was started (opw 606715)
[FIX] website: prevent to split google analytics script
[FIX] ir.qweb: rendering non-string attributes could cause unicode errors (Issue #282)

This occurs because werkzeug.utils.escape() auto-casts
non-basestring values to unicode, while we expect to be
working with bytestrings only.
So when evaluating attribute values, make sure we always
return bytestring values, never int, bool or unicode.
[FIX] account_analytic_analysis: Recurring invoice lines price if pricelist does not match

If the price according to price list is False, use default sale price in the recurring invoice lines
[FIX] account_analytic_analysis: Only allow to select sale pricelist for contracts
[IMP] mandate a variable name in foreach
[FIX] _even/_odd were reversed, also some reformatting thing
[IMP] use enumerate instead of explicit index thing
[IMP] use Sized for iterable size and remove support for count
[IMP] guard for None enum, remove 1 level of indent
[IMP] add kwargs to scaffolded controller so ?debug does not blow up by default
uninstall: avoid errors during uninstall

When uninstalling a module, remove the ir.model.constraint after removing the non-model records and before fields and model definition.
Without this fix, some constraint would be removed too early allowing to have broken relations and data left from removed module.
[IMP] add XID to view name in Ace editor dropdown

When looking for template bit to override or alter (in-core) through the Ace
editor, displaying only the name is a pain:

- the name generally sucks diseased donkey balls
- having to go through the code to find out what the template's XID is is a
  waste of time
[FIX] web: many2many field handle "no_create" option
[FIX] project_timesheet: don't trigger write if there is nothing to write

Triggering an empty write could break constraint (can not update past timesheet) (opw 606963)
[FIX] document_page: allow other users than administrator to create menu to a static page

User should be at least have Configuration settings group to be allowed to create actions. Basic document page users do not have this rights, therefore we temporary give superuser_id to create the action

This is related to rev 133c5033a092845e462b894c0d7739191480c709
[REM] python-qweb support for as-less foreach
[FIX] website_event_track: remove trailing comma in speakers name in event tracks
[IMP] stock: when checking the state of the product, do not recompute the quantity on every move but only the one currently browsing (optiomisation)
[FIX] website: on adding a slide to slider, new slide is last on save

Before, the new slide was set as first slide
Moreover, the indicators were not correct neither