Syntax highlighting of a26cb65 ~( ArchivedProducts)

Discussion and ideas to archive products done with a previous version of a pipeline and allow to create new versions.

== Design ==

=== Archived products accessibility ===

Archived products are to be explicitly accessed (productid+prodtype). 

There is no need to modify/have a map interface dedicated to them (which works with observations anyway, not products), and probably no need in the workspace too?

== Implementation ==

Create an ArchivedProduct model, and a set of search/display interface that allow for copy operations.