Make use of new list type for transactions instead of json

ethpipe/js_types.go

 package ethpipe
 
 import (
-	"encoding/json"
 	"strconv"
 	"strings"
 
@@ -13,11 +12,12 @@ import (
 
 // Block interface exposed to QML
 type JSBlock struct {
+	//Transactions string `json:"transactions"`
 	ref          *ethchain.Block
 	Size         string        `json:"size"`
 	Number       int           `json:"number"`
 	Hash         string        `json:"hash"`
-	Transactions string `json:"transactions"`
+	Transactions *ethutil.List `json:"transactions"`
 	Time         int64         `json:"time"`
 	Coinbase     string        `json:"coinbase"`
 	Name         string        `json:"name"`
@@ -36,12 +36,16 @@ func NewJSBlock(block *ethchain.Block) *JSBlock {
 		ptxs = append(ptxs, *NewJSTx(tx))
 	}
 
+	/*
 		txJson, err := json.Marshal(ptxs)
 		if err != nil {
 			return nil
 		}
-
 		return &JSBlock{ref: block, Size: block.Size().String(), Number: int(block.Number.Uint64()), GasUsed: block.GasUsed.String(), GasLimit: block.GasLimit.String(), Hash: ethutil.Bytes2Hex(block.Hash()), Transactions: string(txJson), Time: block.Time, Coinbase: ethutil.Bytes2Hex(block.Coinbase)}
+	*/
+	list := ethutil.NewList(ptxs)
+
+	return &JSBlock{ref: block, Size: block.Size().String(), Number: int(block.Number.Uint64()), GasUsed: block.GasUsed.String(), GasLimit: block.GasLimit.String(), Hash: ethutil.Bytes2Hex(block.Hash()), Transactions: list, Time: block.Time, Coinbase: ethutil.Bytes2Hex(block.Coinbase)}
 }
 
 func (self *JSBlock) ToString() string {