[datafeed] add parser to import cubicweb xml this parser is configurable through a mapping, which basically tells which entity's relation should be copied. Multiple actions to control backport of data are available: * 'copy': copy the external entities locally (though marked as coming from the data feed source) * 'link': find similar entity internaly (e.g. for states) * 'link-or-create': try to find a similar entity internaly, and create it if necessary (won't be marked as coming from the data feed source, e.g. for tags)

[xml] enhance default entity xml view * format attributes according to their type in a predictable way * move eid/cwuri as top level tag attributes * control which relations should be in using 'relation' form param

[pyro source] benefit from addition of latest_retrieval on CWSource to avoid using a CWProperty to store pyrorql source latest synchronization.

[repository] #1460066: backport datafeed cube as cubicweb source * add some attributes to CWSource to handle this kind of source (not natural to put everything in 'config' string). Adding a CWSource subclass has been attempted then rollbacked because it adds pain to handle multi-sources planning and it introduce an ambiguity on a generic relation (cw_source), which may be a penalty in multiple case * data feed sources are a new kind of source, namely 'copy based', which have no effect on the query planner * a data feed source is associated to a list of url and a parser (appobjects in the 'parsers' registry * entities imported by a data feed have cwuri set to their url on the distant site, their cw_source relation point to the data feed source, though their source stored in the entities table (returned by cw_metainformation) is their physical source, hence 'system'

backport stable

[entity, metadata] huuum, use resolvable url as cwuri... And fix existing ones.

[doc] update some copyrights

[repo, ms] fix pb introduced in 6941:9ed02daa7dbb resulting in missing relation deletes when an entity is deleted

[tabs js] merge tabs and lazy js files into cw.ajax.js and use camel case names to satisfy js coding standards

[schema, ui] fix is_subobject to skip cw_source relation (else everything is considered as a subobject, since this relation is now composite)

[admin ui] nicer views for users/groups management

[test, ui] mark CWSourceSchemaConfig as an internal type

backport stable

[js] using the actual registry fixes spurious warnings

[pyrorql source] using 'time' option type is more convenient

[sources] refactor source creation and options handling * options validation * ease proper update of source's config on configuration change

[sources] rewrite the way pyrorql mapping are stored in the database so it can be reused for other sources (eg datafeed+cwxml)

[sources] reorganize abstract source code, drop no more used cleanup_entities_info and _cleanup_system_relations methods

[source schema] fix permission pb on cw_host_config_of relation + add composite on cw_source, so entities from a source are properly removed when the source is removed

[repo, ms] optimise external source deletion by using source's eid instead of name

[rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation

[c-c] fix crash on delete instance + potential others when user don't specify db user's password

add a rql directive to restructuredtext

[pkg] bump dependency on logilab.database