Update README

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

README.md

@@ -1,26 +1,26 @@
-# Work In Progress
+# Runtimes
 
-Do not modify the `relay/` or `system-parachains/` folder. They are currently read-only.
+This repository houses the code required to build the runtimes for Polkadot, Kusama, and their System-Parachains. Its maintenance is overseen by the Fellowship, as decreed by the Polkadot and Kusama Governance. The primary objective is to provide excellent code, which can subsequently be enacted on-chain through a decentralized referendum.
 
-## Folder Structure
+## Structure
+
+Each leaf folder contains one runtime crate:
+
+<!-- Run "tree -I 'target' -d -L 3" and then delete some folders from Polkadot and Kusama. -->
 
-<!-- tree -I 'target' -d -L 3 -->
 ```pre
-.
 ├── relay
-│   ├── kusama
-│   │   ├── constants
-│   │   └── src
-│   └── polkadot
-│       ├── constants
-│       └── src
+│   ├── kusama
+│   └── polkadot
 └── system-parachains
     ├── asset-hubs
-    │   ├── asset-hub-kusama
-    │   └── asset-hub-polkadot
+    │   ├── asset-hub-kusama
+    │   └── asset-hub-polkadot
     ├── bridge-hubs
-    │   ├── bridge-hub-kusama
-    │   └── bridge-hub-polkadot
-    └── collectives
-        └── collectives-polkadot
+    │   ├── bridge-hub-kusama
+    │   └── bridge-hub-polkadot
+    ├── collectives
+    │   └── collectives-polkadot
+    └── gluttons
+        └── glutton-kusama
 ```