[entity] add a "repo_side" parameter to `_cw_dont_cache_attribute`
This parameter (defaulting to `False`) is used to inform cubicweb that we really
really do not want to cache a value during creation or update. This will be used
by a storage that may do very specific processing on attribute values that result
in a stored value different than the provided one (e.g. BFSS `fs_importing`
mode).
.. role:: raw-html(raw)
:format: html
RSS driven
----------
RSS is a pretty useful technology that can be widely used on this
site. Any set of data can be presented as RSS. You can then plug in
an RSS reader into that and follow the site activity. For example :
:raw-html:`<p><a class="reference"
href="view?vid=rss&rql=Any+X%2CM+WHERE+X+modification_date+M+ORDERBY+M+DESC+LIMIT+30"><img
alt="rss" src="data/rss.png"> latest changes</a></p>`