Renamed wire.go to codec.go (#3827)

* Renamed wire.go to codec.go

- Wire was the previous name of amino
- Codec describes the file better than `wire` & `amino`

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

* ide error

* rename amino.go to codec.go

state/codec.go

@@ -0,0 +1,12 @@
+package state
+
+import (
+	amino "github.com/tendermint/go-amino"
+	cryptoAmino "github.com/tendermint/tendermint/crypto/encoding/amino"
+)
+
+var cdc = amino.NewCodec()
+
+func init() {
+	cryptoAmino.RegisterAmino(cdc)
+}