Merging latest minor Cocoa changes

Summary: BinaryProtocol handling of null strings, destructor, and contributors email fix. Submitted by Andrew McGeachie

Reviewed By: mcslee


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665278 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 0557374..e6c9682 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -5,7 +5,7 @@
 Dave Engberg <engberg@gmail.com>
 -JavaBean/JavaDoc enhancements
 
-Andrew McGeachie <geech@evernote.com>
+Andrew McGeachie <geechorama@gmail.com>
 -Cocoa/Objective-C support
 
 Ben Maurer <bmaurer@andrew.cmu.edu>