[repository] Drop the entities.extid column and associated cache
This was not necessary anymore with promoted usage of the new data import API.
Turn repository's _type_extid_cache to _type_cache with only the entity's type
as key.
This introduces an backward incompatible change: entity_metas dict doesn't
contains anymore the extid key, but it doesn't seem used at all anywhere, so
this sounds acceptable.
Closes #15538317
Javascript Coding Standards
---------------------------
(Draft, to be continued)
:Naming: camelCase, except for CONSTANTS
Indentation rules
~~~~~~~~~~~~~~~~~
- espace avant accolade ouvrante
- retour à la ligne après accolade ouvrante (éventuellement pas
de retour à la ligne s'il y a tout sur la même ligne, mais ce n'est
pas le cas ici.
- no tabs
Documentation
~~~~~~~~~~~~~
XXX explain comment format for documentation generation
Coding
~~~~~~
- Don't forget 'var' before variable definition, and semi-colon (';') after **each** statement.
- Check the firebug console for deprecation warnings
API usage
~~~~~~~~~
- unless intended, use jQuery('container') rather than jqNode('container')
See also
~~~~~~~~
http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml