docs/spec: flesh out dir structure and update index

docs/spec/README.md

@@ -5,15 +5,14 @@ the Cosmos Hub.
 
 NOTE: the specifications are not yet complete and very much a work in progress.
 
-- [Basecoin](basecoin) - Cosmos SDK related specifications and transactions for
+- [Store](store) - The core Merkle store that holds the state.
-  sending tokens.
+- [Auth](auth) - The structure and authnentication of accounts and transactions.
-- [Governance](governance) - Governance related specifications including 
+- [Bank](bank) - Sending tokens.
-  proposals and voting.
+- [Governance](governance) - Proposals and voting.
-- [IBC](ibc) - Specification of the Cosmos inter-blockchain communication (IBC) protocol.
+- [IBC](ibc) - Inter-Blockchain Communication (IBC) protocol.
-- [Staking](staking) - Proof-of-stake related specifications including bonding 
+- [Staking](staking) - Proof-of-stake bonding, delegation, etc.
-  and delegation transactions, inflation, etc.
+- [Slashing](slashing) - Validator punishment mechanisms.
-- [Slashing](slashing) - Specifications of validator punishment mechanisms
+- [Provisioning](provisioning) - Fee distribution, and atom provision distribution 
-- [Provisioning](provisioning) - Fee distribution, and atom provision distribution specification
 - [Other](other) - Other components of the Cosmos Hub, including the reserve 
   pool, All in Bits vesting, etc.