added test case to monitor speed improvements in the repository code. To use it, add a test in a patch, then hack CW to speed it up in another patch, updating the test if needed. By running the test with and without the second patch applied you can easily see the speed improvements

backport stable changes to default

[js] update jquery.corner.js to the latest version (uses native css support for browser that provide it); closes #1625065

[js/css] remove old versions of ui.tabs/slider etc.; closes #1625085

[devtools] make return value of get_response_header(raw=True) consistent wrt get_header(raw=True) i.e. get_response_header(raw=True) now returns the first element of the list rather than the list itself.

[widgets] handle no value label for tristate radios, put default separator on class for easier redefinition - closes #1624839

[doc] update of the update

[tz postgres support] we've to commit the connection once time-zone is set, else we may loose the setting

[tz support] more tests

[dataimport] actually commit every desired number...

[doc] major update of the install documentation

[facets] make rangefacet comply with start_unfolded (closes #1615869)

[testlib] make a clear distinction between input / output HTTP headers The get_header() / set_header() API is the same as for CubicWebRequestBase : - get_header() returns the **request** header - set_header() / add_header() works on the **response** header FakeRequest adds two additional methods : - get_response_header() returns the **reponse** header - set_request_header() adds a **request** header FakeRequest now uses the `headers_out` ineherited from CubicWebRequestBase. It also uses a `_headers_in` attribute

[entity] create_entity/cw_instantiate should initialize entity's cache to avoid later queries

[testlib] refactor create_user and grant_permission to make them usable from pre_setup_database

[3.12 regression] don't access to __class__ directly, it may raise AttributeError