older versions readme explanation

README.md

@@ -16,7 +16,7 @@
 | ----------------- |------------------------------|
 | `0.10`            | `0.1.x`                      |
 | `1.0.0`        | `0.3.x`                      |
-| `>= 1.3.0`        | `>= 3.1.x`                      |
+| `>= 1.3.0`        | `3.x.x`                      |
 
 ## Breaking changes
 Version 3.2 of BigchainDB JavaScript Driver introduces a new way of creating transfer transactions. Check [older versions](https://docs.bigchaindb.com/projects/js-driver/en/latest/readme.html#features)

docs/source/readme.rst

@@ -34,13 +34,13 @@ Compatibility Matrix
 +-----------------------+----------------------------------+
 | ``1.0``               | ``0.3.x``                        |
 +-----------------------+----------------------------------+
-| ``1.3``               | ``3.1.x``                        |
+| ``1.3``               | ``3.x.x``                        |
 +-----------------------+----------------------------------+
 
 
 Older versions
 --------------------
-For versions below 3.2, the transfer transaction is like this:
+For versions below 3.2, a transfer transaction looked like:
 
 .. code-block:: js
 
@@ -52,3 +52,31 @@ For versions below 3.2, the transfer transaction is like this:
 	)
 
 	const signedTransfer = BigchainDB.Transaction.signTransaction(createTranfer, keypair.privateKey)
+
+
+In order to upgrade and do it compatible with the new driver version, this transaction should be now:
+
+.. code-block:: js
+
+	const createTranfer = BigchainDB.Transaction.makeTransferTransaction(
+		[{ tx: txCreated, output_index: 0 }],
+		[aliceOutput],
+		metaData
+	)
+
+   const signedTransfer = BigchainDB.Transaction.signTransaction(createTranfer, keypair.privateKey)
+
+
+The upgrade allows to create transfer transaction spending outputs that belong to different transactions.
+So for instance is now possible to create a transfer transaction spending two outputs from two different create transactions:
+
+
+.. code-block:: js
+
+	const createTranfer = BigchainDB.Transaction.makeTransferTransaction(
+		[{ tx: txCreated1, output_index: 0 }, { tx: txCreated2, output_index: 0 }],
+		[aliceOutput],
+		metaData
+	)
+
+   const signedTransfer = BigchainDB.Transaction.signTransaction(createTranfer, keypair.privateKey)