Document and deal with Badges at subgraph level

[greenlucid]

Badges should be handled at subgraph level for speedy queries.
The architecture is:

Main list (linked in MetaList with Badges list)
Badges list (linked in MetaList with Main list. List of Lists)

• Badge A (linked in MetaList with Badges list. Each Item is a reference to an item in Main list.)
• Badge B (linked in MetaList with Badges list. Each Item is a reference to an item in Main list.)
• (...)

[greenlucid]

In the interest of releasing as fast as possible, and given that nothing about this deals with the contract itself, badges are postponed into a later upgrade of Stake Curate. In other words, Stake Curate won't launch with badges enabled in the frontend or subgraph.