Generate conference pages

[guaraqe]

The idea is to have a separated Elm page that is specialized only on generating Conference pages. These pages contain essentially the same information as the unit's information page, meaning that we can re-use API routes, but the page will have a different layout.

• The page will be identified by a Id Unit, which will be the root of the tree.
• The main page should contain descriptions, the chair and members.
• There should be a menu giving access to subparts, which will have similar pages. This menu should work like a tree, corresponding to the tree in the graph.
• Elements in the menu should load lazily, to avoid problems with eventual cycles one created by accident.
• Make sure that descriptions are rendered as markdown so that we have correct (and configurable) formatting, and all necessary external links work.

Steps:

• Create a second main in Elm, which just displays a unit's information.
• Make sure it is exposed by the API.
• Add it to the deployment.
• Proceed with the other features necessary in the page.