Rename key.hpp to key-locator.hpp. Refs #1089.
diff --git a/src/key.cpp b/src/key.cpp
index 24501ff..fbd7729 100644
--- a/src/key.cpp
+++ b/src/key.cpp
@@ -6,7 +6,7 @@
  */
 
 #include <ndn-cpp/common.hpp>
-#include <ndn-cpp/key.hpp>
+#include <ndn-cpp/key-locator.hpp>
 #include "c/key-locator.h"
 
 using namespace std;