Merge PR #125: Refactor nchainz to use config instead of metaprogramming

* fix: remove agoric-solo; ag-nchainz is in agoric-sdk

More fixes for the general nchainz script and agoric.json.

* refactor: remove metaprogramming from nchainz; use a config file

* feat: factor nchainz run command into chains and clients

configs/agoric.json

@@ -3,7 +3,9 @@
   "url": "https://testnet.agoric.com",
   "daemon": "ag-chain-cosmos",
   "cli": "ag-cosmos-helper",
-  "daemon-start": "bootaddr=$($CLI --home \"$DATA/$ID/n0/$CLI\" keys show n0 --keyring-backend=test | jq -r .address)\necho bootaddr=$bootaddr, $chainid\nDEBUG=$CONFIG ROLE=two_chain BOOT_ADDRESS=$bootaddr $DAEMON --home \"$DAEMON_HOME\" start --pruning=nothing",
+  "daemon-testnet": "ag-nchainz testnet $chainid -o $chainid --v 1 --chain-id $chainid --node-dir-prefix n --keyring-backend test",
+  "daemon-start": "ag-nchainz start-daemon $chainid --home \"$DAEMON_HOME\" start --pruning=nothing",
+  "post-lite-client": "ag-nchainz start-solos $chainid",
   "link": {
     "account-prefix": "agoric",
     "gas": 200000,