Applying our private member naming convention

Just trying to make @half-ogre happy

Octokit.Reactive/Clients/ObservableOrganizationsClient.cs

@@ -6,32 +6,32 @@ namespace Octokit.Reactive.Clients
 {
     public class ObservableOrganizationsClient : IObservableOrganizationsClient
     {
-        readonly IOrganizationsClient client;
+        readonly IOrganizationsClient _client;
 
         public ObservableOrganizationsClient(IOrganizationsClient client)
         {
             Ensure.ArgumentNotNull(client, "client");
 
-            this.client = client;
+            _client = client;
         }
 
         public IObservable<Organization> Get(string org)
         {
             Ensure.ArgumentNotNullOrEmptyString(org, "org");
 
-            return client.Get(org).ToObservable();
+            return _client.Get(org).ToObservable();
         }
 
         public IObservable<IReadOnlyCollection<Organization>> GetAllForCurrent()
         {
-            return client.GetAllForCurrent().ToObservable();
+            return _client.GetAllForCurrent().ToObservable();
         }
 
         public IObservable<IReadOnlyCollection<Organization>> GetAll(string user)
         {
             Ensure.ArgumentNotNullOrEmptyString(user, "user");
 
-            return client.GetAll(user).ToObservable();
+            return _client.GetAll(user).ToObservable();
         }
     }
 }