Added OpenX Bidder adapter documentation

docs/bidders/openx.md

@@ -0,0 +1,62 @@
+# OpenX Bidder
+
+OpenX supports the following parameters:
+
+| property | type | required? | description | example |
+|----------|------|-----------|-------------|---------|
+| unit | string | required | The ad unit id | "10092842" |
+| delDomain | string | required | The delivery domain for the customer | "sademo-d.openx.net" |
+| customFloor | number | optional | The minimum CPM price in USD | 1.50 - sets a $1.50 floor |
+| customParams | object | optional | User-defined targeting key-value pairs | {key1: "v1", key2: ["v2","v3"]} |
+
+If you have any questions regarding setting up, please reach out to your account manager or 
+<support@openx.com>
+
+## Test Request
+
+### App Impression Object
+```
+{
+  "id": "test-impression-id",
+  "banner": {
+    "format": [
+      {
+        "w": 480,
+        "h": 300
+      },
+      {
+        "w": 480,
+        "h": 320
+      }
+    ]
+  },
+  "ext": {
+    "openx": {
+      "delDomain": "mobile-d.openx.net",
+      "unit": "541028953"
+    }
+  }
+}
+```
+
+
+### Web
+```
+{
+  "id": "div1",
+  "ext": {
+    "openx": {
+      "unit": "540949380",
+      "delDomain": "sademo-d.openx.net"
+    },
+  },
+  "banner": {
+    "format": [
+      {
+        "w": 728,
+        "h": 90
+      }
+    ]
+  }
+}
+```