Merge pull request #1597 from public/2015

Update copyright for 2015
diff --git a/src/cryptography/__about__.py b/src/cryptography/__about__.py
index f2700d5..ee16edd 100644
--- a/src/cryptography/__about__.py
+++ b/src/cryptography/__about__.py
@@ -20,4 +20,4 @@
 __email__ = "cryptography-dev@python.org"
 
 __license__ = "BSD or Apache License, Version 2.0"
-__copyright__ = "Copyright 2013-2014 {0}".format(__author__)
+__copyright__ = "Copyright 2013-2015 {0}".format(__author__)