bug: Missing /account/transfer endpoint

* Created object and endpoint data for /account/transfer

Author: Josh Sager

src/data/endpoints/account.yaml

@@ -673,3 +673,19 @@ endpoints:
               The PayerID returned by PayPal during the transaction authorization
               process.
             value: ABCDEFGHIJKLM
+  /account/transfer:
+    group: Transfer
+    type: resource
+    authenticated: true
+    description: >
+      View your network utilization for the current month, in gigabytes.
+    methods:
+      GET:
+        response: transfer
+        oauth: account:view
+        description: >
+          Returns transfer pool statistics based on active Linodes and
+          NodeBalancers on your account.
+        examples:
+          curl: |
+            curl https://$api_root/$version/account/transfer

src/data/objects/transfer.yaml

@@ -0,0 +1,21 @@
+name: Transfer
+prefix: transfer
+description: >
+    Transfer pool statistics
+schema:
+  billable:
+    type: Integer
+    value: 0
+    description: Amount of billable pool.
+  quota:
+    type: Integer
+    value: 2000
+    description: The amount of network usage allowed each billing cycle.
+  used:
+    type: Integer
+    value: 0
+    description: The amount of network usage you have used this billing cycle.
+  max:
+    type: Integer
+    value: 2000
+    description: Help me!