new protocol: the server sends serialized tx, deserialize it in the client

scripts/validate_tx

@@ -29,6 +29,10 @@ def hash_header(res):
 
 
 def verify_tx(tx_hash):
+    rawtx = i.synchronous_get([ ('blockchain.transaction.get',[tx_hash]) ])[0]
+    print rawtx
+    return
+    
     res = i.synchronous_get([ ('blockchain.transaction.get_merkle',[tx_hash]) ])[0]
     merkle_root = hash_merkle_root(res['merkle'], tx_hash, res['pos'])
     tx_height = res.get('block_height')