Fixed dataformat. Moved transactions list onto voucher.

And added two new tests

README.md

@@ -4,25 +4,12 @@ Client for doing HTTP requests to the SETRA api
 
 ```python
 from setra_client import SetraClient
-from setra_client.models import Batch, Multi, Transaction, Voucher
+from setra_client.models import Batch, Transaction, Voucher
 
-c = SetraClient(url='https://example.com',
+client = SetraClient(url='https://example.com',
                 headers={'X-Gravitee-API-Key': 'c-d-a-b'})
 
-batch = Batch.from_dict({
-    "client": 1,
-    "batchid": 2,
-    "period": 3,
-    "interface": 4,
-    "vouchertype": 5,
-    "batchid_interface": 6
-})
-vouchers = [Voucher.from_dict({
-    "batchid": 1,
-    "voucherno_interface": 2,
-    "exref": 3,
-    "voucherno": 4
-})]
+
 transactions = [Transaction.from_dict({
     "voucherid": 1,
     "account": 1,
@@ -44,8 +31,22 @@ transactions = [Transaction.from_dict({
     "extinvref": 1
 })]
 
-multi = Multi(batch=batch, vouchers=vouchers, transactions=transactions)
-response = c.post_multi(multi)
+vouchers = [Voucher.from_dict({
+    "exref": 3,
+    "voucherno": 4,
+    "transactions": transactions
+})]
+
+batch = Batch.from_dict({
+    "client": 1,
+    "batchid": 2,
+    "period": 3,
+    "interface": 4,
+    "vouchertype": 5,
+    "vouchers": vouchers
+})
+
+response = client.post_new_batch(batch)
 ```
 
 Running tests