Merge eth-go repository into go-ethereum

mist, etheruem have been moved to cmd/

tests/helper/common.go

@@ -0,0 +1,11 @@
+package helper
+
+import "github.com/ethereum/go-ethereum/ethutil"
+
+func FromHex(h string) []byte {
+	if ethutil.IsHex(h) {
+		h = h[2:]
+	}
+
+	return ethutil.Hex2Bytes(h)
+}