Implement more of the JavaScript GL API.

gin/converter.h

Index: gin/converter.h
diff --git a/gin/converter.h b/gin/converter.h
index ee029a7f770701be70983cd58767acef5341068a..1ce459e15cc4c4b9e058bde4897eee3a6ad4fbcc 100644
--- a/gin/converter.h
+++ b/gin/converter.h
@@ -65,6 +65,15 @@ struct GIN_EXPORT Converter<uint64_t> {
 };
 
 template<>
+struct GIN_EXPORT Converter<float> {
+  static v8::Handle<v8::Value> ToV8(v8::Isolate* isolate,
+                                    float val);
+  static bool FromV8(v8::Isolate* isolate,
+                     v8::Handle<v8::Value> val,
+                     float* out);
+};
+
+template<>
 struct GIN_EXPORT Converter<double> {
   static v8::Handle<v8::Value> ToV8(v8::Isolate* isolate,
                                     double val);