Update addresses and add DummyToken artifact

packages/0x.js/src/artifacts/DummyToken.json

@@ -0,0 +1,23 @@
+{
+    "contract_name": "DummyToken",
+    "abi":
+    [
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_target",
+                    "type": "address"
+                },
+                {
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "setBalance",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        }
+    ]
+}

packages/0x.js/src/artifacts/EtherToken.json

@@ -244,7 +244,7 @@
       "address": "0x05d090b51c40b020eab3bfcb6a2dff130df22e9c"
     },
     "50": {
-      "address": "0x48bacb9266a570d521063ef5dd96e61686dbe788"
+      "address": "0x871dd7c2b4b25e1aa18728e9d5f2af4c4e431f5c"
     }
   }
 }

packages/0x.js/src/artifacts/Exchange.json

@@ -601,7 +601,7 @@
       "address": "0x90fe2af704b34e0224bf2299c838e04d4dcf1364"
     },
     "50": {
-      "address": "0xb69e673309512a9d726f87304c6984054f87a93b"
+      "address": "0x48bacb9266a570d521063ef5dd96e61686dbe788"
     }
   }
 }

packages/0x.js/src/artifacts/TokenTransferProxy.json

@@ -178,7 +178,7 @@
         "address": "0x087eed4bc1ee3de49befbd66c662b434b15d49d4"
       },
       "50": {
-        "address": "0x871dd7c2b4b25e1aa18728e9d5f2af4c4e431f5c"
+        "address": "0x1dc4c1cefef38a777b15aa20260a54e584b16c48"
       }
   }
 }

packages/0x.js/src/artifacts/ZRX.json

@@ -11,7 +11,7 @@
       "address": "0x6ff6c0ff1d68b964901f986d4c9fa3ac68346570"
     },
     "50": {
-      "address": "0x25b8fe1de9daf8ba351890744ff28cf7dfa8f5e3"
+      "address": "0x1d7022f5b17d2f8b695918fb48fa1089c9f85401"
     }
   }
 }