As of June 22 2016, the use of API key is required to access the
following:
- Google Maps JavaScript API
- Google Static Maps API
- Google Street View Image API
https://developers.google.com/maps/pricing-and-plans/standard-plan-2016-update
For domains accessing the API before June 22, it will still work without
an API key. Since Google advises to use the API key, we hide the Maps if
no API key is defined.
Migration of website module to new API.
The tricky phase is ir_http.py : we need to use `request.env`
only when the authenfication phase is done. Normally by
calling `super` of `_dispatch` method, but website module
required it to be done before. This is important since
`env`is a lazy property of `request` object.
Some hack were kept since this commit is a migration ('RequestUID'
in ir.http, ...)
Some docstrings were added.
David Vidal