[test] running transaction while session is closed are now killed, update test accordingly

[security] fix read rql expression insertion: we should not insert rql expr on variables only referenced in neged relation

[rql2sql] test and fix crash when OR in HAVING where both expresion are 'fake' having terms (eg not using aggregat function)

cleanups

[config] use hashlib to avoid warning w/ py2.6

[req] hashlib has no hash function, but has an hash1 function even in python 2.5

[utils] improve repr() of RepeatList

[doc] fix typo

[selectors] use before-registry-reset event to init is_instance cache: cleaner code and avoid reloading bug (making hooks test fail for instance)

[vreg] new [before|after]-registry-reset event, taking vreg as argument

[doc] update book for adapters

[reledit] fix relation cardinality handling

[selectors] provide a new, optimized, is_instance selector that should at some point replace implements (along with the adaptable selector)

[web/views/massmailing] fix cancel button msg/icon

[testlib] improve test description messages

[web/views/reledit] fix typo (-add we used as id component in delete id)

[web/test] fix test (doreledit must have a formid and this is now checked)

[web ui] add missing image

[ITree] small fixes: parent_entity is a IBreadCrumbs method, we should use .parent on ITree

restore bw compat on Entity.related_rql

reledit refactoring * js handling rewritten to exploit all form capabilities (such as file upload ...) * attribute-like composite relations (one ttype, cardinality in '?1' from composite side) are more cutely handled, with a 'add'/'delete' additional actions/icons * a reledit_ctrl rtag to finely control: reloading, edition and default values * a proper chapter in the documentation (book) * many bugfixes

backport stable

cleanup

[idownloadable] make the download view http cache friendly

[publisher] avoid useless rollback after successful commit, which clutters debug logs and may also not be cost-free

[controller] same method defined on the base class

backport stable

merge stable heads