Implement initial engio experiments

Source/Integration/StringDecoder.h

@@ -4,6 +4,8 @@
 #include "lpx-basebuffer.hpp"
 
 
+using FlxSimpleDynamic = SimpleDynamic<std::string>;
+
 class FlxStreamBufferCore {
 private:
 	bool err_eof_on_read_;
@@ -28,13 +30,13 @@ class FlxStreamBuffer : public BaseBuffer<FlxStreamBufferCore, std::string> {
 public:
     using BaseBuffer::BaseBuffer;
 
-    void write_dxyz(const FVector &xyz) {
+    void write_dvector(const FVector &xyz) {
         write_double(xyz.X);
         write_double(xyz.Y);
         write_double(xyz.Z);
     }
 
-    FVector read_dxyz() {
+    FVector read_dvector() {
         double x = read_double();
         double y = read_double();
         double z = read_double();