JSON cleanups:

* Fix Json headers to include what they use.
* Get rid of ripple/json/api directory.

src/ripple/json/json_reader.h

@@ -20,6 +20,13 @@
 #ifndef CPPTL_JSON_READER_H_INCLUDED
 # define CPPTL_JSON_READER_H_INCLUDED
 
+#include <ripple/json/json_config.h>
+#include <ripple/json/json_features.h>
+#include <ripple/json/json_forwards.h>
+#include <ripple/json/json_value.h>
+
+#include <stack>
+
 namespace Json
 {
 

src/ripple/json/json_value.h

@@ -20,6 +20,9 @@
 #ifndef CPPTL_JSON_H_INCLUDED
 #define CPPTL_JSON_H_INCLUDED
 
+#include <ripple/json/json_config.h>
+#include <ripple/json/json_forwards.h>
+
 /** \brief JSON (JavaScript Object Notation).
  */
 namespace Json

src/ripple/unity/json.h

@@ -32,7 +32,7 @@
 // For json/
 //
 // VFALCO TODO Clean up these one-offs
-#include <ripple/json/api/json_config.h> // Needed before these cpptl includes
+#include <ripple/json/json_config.h> // Needed before these cpptl includes
 #ifndef JSON_USE_CPPTL_SMALLMAP
 #include <map>
 #else
@@ -42,12 +42,12 @@
 #include <cpptl/forwards.h>
 #endif
 
-#include <ripple/json/api/json_forwards.h>
-#include <ripple/json/api/json_features.h>
-#include <ripple/json/api/json_value.h>
-#include <ripple/json/api/json_reader.h>
-#include <ripple/json/api/json_writer.h>
+#include <ripple/json/json_forwards.h>
+#include <ripple/json/json_features.h>
+#include <ripple/json/json_value.h>
+#include <ripple/json/json_reader.h>
+#include <ripple/json/json_writer.h>
 
-#include <ripple/json/api/JsonPropertyStream.h>
+#include <ripple/json/JsonPropertyStream.h>
 
 #endif