Merge PR #3119: Move all store keys into constants

* Move all store keys into constants
* Fix lint issue
* Add Pending.md
* QuerierKey -> QuerierRoute

docs/examples/basecoin/app/app.go

@@ -62,8 +62,8 @@ func NewBasecoinApp(logger log.Logger, db dbm.DB, baseAppOptions ...func(*bam.Ba
 	var app = &BasecoinApp{
 		cdc:        cdc,
 		BaseApp:    bam.NewBaseApp(appName, logger, db, auth.DefaultTxDecoder(cdc), baseAppOptions...),
-		keyMain:    sdk.NewKVStoreKey("main"),
-		keyAccount: sdk.NewKVStoreKey("acc"),
+		keyMain:    sdk.NewKVStoreKey(bam.MainStoreKey),
+		keyAccount: sdk.NewKVStoreKey(auth.StoreKey),
 		keyIBC:     sdk.NewKVStoreKey("ibc"),
 	}