[doc] fix of personnal etc directory in book

[web] add a Forbidden exception This is similar to the Unauthorized exception, but generates a 403 error instead of a 401 (Unauthorized)

[web] add a ``anonymize-jsonp-queries`` option in file configuration (closes #2465388) This option controls connection anonymizing before executing any query for CSRF / safety reason.

[downloadable] fix filename in HTTP header (closes #2522325, #2522324) Before this changeset we use the `filename` header with utf8 encoded filename all the time. However RFC6266 says: The parameters "filename" and "filename*" differ only in that "filename*" uses the encoding defined in [RFC5987], allowing the use of characters not present in the ISO-8859-1 character set ([ISO-8859-1]). Therefore, we alter the code to: 1. Use `filename` and `ascii` encoding whenever possible, 2. use `filename*` with `utf8` encoding otherwise (with a filename fallback for old browser) We also switch the `content-disposition` value to attachement if filename is specified, this will result as a mandatory download according to RFC6266. This mandatory download is the expected behavior. We changes the filename encoding to RFC5987 which is simpler, supported by all and modern browser (including IE from version 6) and does not suffer from the continuation issue. (see ticket #2522324 for details)

docstring typo

[facet] make BitFieldFacet allow special 0 value. Closes #2522697

[doc] ubuntu LTS is now Precise Pangolin

backport stable

[server] implement base_url with secure=True (closes #2508638)

[validation api] properly use yams 0.36 validation error api and update message catalog. Follows bbe0d6985e59 the creation of the `translate` method in the 23a10f049447 yams commit.