Add support for tile plugin

include/util/json_container.hpp

@@ -50,15 +50,6 @@ namespace json
 struct Object;
 struct Array;
 
-// For encoding raw binary data in a JSON response
-struct Buffer
-{
-    Buffer() = default;
-    Buffer(const char *value) : value(value) {}
-    Buffer(std::string value) : value(std::move(value)) {}
-    std::string value;
-};
-
 struct String
 {
     String() = default;
@@ -87,7 +78,6 @@ struct Null
 };
 
 using Value = mapbox::util::variant<String,
-                                    Buffer,
                                     Number,
                                     mapbox::util::recursive_wrapper<Object>,
                                     mapbox::util::recursive_wrapper<Array>,

include/util/json_renderer.hpp

@@ -25,13 +25,6 @@ struct Renderer
 {
     explicit Renderer(std::ostream &_out) : out(_out) {}
 
-    void operator()(const Buffer &buffer) const
-    {
-        out << "\"";
-        out << escape_JSON(buffer.value);
-        out << "\"";
-    }
-
     void operator()(const String &string) const
     {
         out << "\"";
@@ -88,14 +81,6 @@ struct ArrayRenderer
 {
     explicit ArrayRenderer(std::vector<char> &_out) : out(_out) {}
 
-    void operator()(const Buffer &buffer) const
-    {
-        out.push_back('\"');
-        const auto string_to_insert = escape_JSON(buffer.value);
-        out.insert(std::end(out), std::begin(string_to_insert), std::end(string_to_insert));
-        out.push_back('\"');
-    }
-
     void operator()(const String &string) const
     {
         out.push_back('\"');