Merge pull request #404 from jaseaman/403-missing-phone-type

Issue-403: Added missing OFFICE enum value for phone type

Author: MJMortimer

Xero.Api/Core/Model/Types/PhoneType.cs

@@ -12,6 +12,8 @@ public enum PhoneType
         [EnumMember(Value = "MOBILE")]
         Mobile,
         [EnumMember(Value = "FAX")]
-        Fax        
+        Fax,
+        [EnumMember(Value = "OFFICE")]
+        Office        
     }
 }