Windows Code::Blocks support etc.

* Windows Code::Blocks support in `src/ofxNatNet.cpp`
    * changed `interface` to `_interface` for avoiding name conflict
    * `command_socket.bind(...)` block is deleted since it "Cannot be used together with connect()." according to <http://pocoproject.org/docs/Poco.Net.DatagramSocket.html#12659> (and this seems problematic)
    * deleted `ofSleepMillis(1);` because this causes too much delay on Windows (and still ok with OSX)
* `ofxNatNet::listInterfaces()` is added to list all interfaces (because Windows' interfaces often have weird name)
* Project files for win_cb are added
* Deprecated `ofBox` is replaced

てきとうに時間のあるときにmergeおねがいします！！！