jubatus-msgpack-rpc header file location (C++ backend)

I'm using C++ backend, there seems a minor glitch in generated hpp files,

   jubatus-msgpack-rpc will install header files into

```
 /usr/local/include/jubatus/msgpack/rpc/
```

   but generated hpp file (i.e. classifier_client.hpp) uses 

```
 #include <msgpack/rpc/client.h>
```

Shouldn't it be 

```
 #include <jubatus/msgpack/rpc/client.h>
```

?

Jianshi
