cleanups

[ctxcomponents vreg] allow to specify 'no cache' using __cache argument

[js utils] backport some generic code from comments cube to handle inline ajax form as you get to add comment to entities. Following stuff has been generalized and backported to ease such things: * lazy_view_holder() method on EntityCtxComponent class, to build place holder where the form will be inserted * ajax_composite_form() function in cw.web.views.ajaxedit, to build the form itself * reload() and reloadCtxComponentsSection() javascript function in cubicweb.ajax.js for the javascript processing side

[doc] update photo web site tutorial: we're starting from cw 3.10/file 1.9+

[view] fix/enhance view.render * give view init args when selecting row view * optimize by avoiding re-selection on rset of size 1

[js lib] new string.rstrip method

[ibreadcrumb] fix breadcrumb adapter backward compat

[selectors] modify workflow selectors: is_in_state, on_transition - factorize `is_on_state` selector - add new `on_transition` selector Especially useful to match pending transitions to enable notifications when your workflow allows several transition to the same states. Note that if workflow `change_state` adapter method is used, this selector will not be triggered. In debug mode: These both selectors will check against the entity current workflow if expected values given in selector argument are valid. ValueError exception will be raised for unmatching state/transition names against the current workflow (generic etype workflow). (check against custom workflow is not implemented)

[cw-ctl] use default `mkdtemp()` behaviour to store backup file internally When using `mkdtemp(dir=instbkdir)`, a dedicated system user which hasn't the permissions to write in /var/lib/cubicweb/instances/$INSTANCE/backup will not be able to run the db-dump command.

[debian] fix lintian errors