[css] change `h3` and `h4` styles(closes #893244)

querier: Improve error message when ERQLExpression fails on some entity (closes #2267081) When an RQL variable is indeed "constant" (we know it's eid) ERQL expression are not inserted but checked prior query execution. If the session have no read access to the entity an `Unauthorized` exception is raised. This changeset add a meaningfull message to this exception:: No read acces on "X" with eid 42.

[js] fix error in loadRemote docstring

[doc] add missing section titles

[doc] fix bad indentation

[server/ldaputils] do not allow ldap.server_down to crash on us

Add missing with_statement import for python2.5 compat

[devtools] make xvfb-run not wait 3s each time (closes #2265710) Ask Xvfb to tell us when it's ready instead of unconditionally waiting 3 seconds. Sync from http://anonscm.debian.org/gitweb/?p=pkg-xorg/xserver/xorg-server.git;a=blob_plain;f=debian/local/xvfb-run;hb=HEAD

[view] breadcrumbs layout broken with long elements (closes #1347486)

[static-file] return Unauthorized on blocked directory listing This is more appropriate than 404 NOT FOUND

[login redirect] only add postlogin_path argument when meaningful

static-file: properly set/use cache header for static file (closes #2255013) This changesets enables the standard http cache mechanism where the static controller may reply "304 Not modified" based on `last-modified` in HTTP response and `if-modified-since` in HTTP query. The last modified time is computed using the file-system information. The pre-existing logic using an `Expires` header to prevent client from sending request stay in place. The new logic just prevents sending the file again if not necessary.

[repository] move task manager instantiation outside repository. Repository callers are in charge of providing a task manager. The task manager is optional when the repository is not a server. This part is not really expected to work well yet. But we aim to remove all task management responsibilities from the Repository object.

[repository] split repo initialization from starting looping task (closes #2204047) This separation highlights that two distinct operations are done. This is a step towards a full distinction between repo, server and looping tasks

[repo looping task] move looping task logic in a dedicated object (progress #2204047)

[manage / default index views] discard login/logout templates