Add Yen and Ro support for klc

[jpc-ae]

Yen and Ro are currently marked as unsupported for klc, however a conversion from the Japanese klc shows these keys as:

    { "pos": "VolumeUp", "shortcutPos": "Iso", "letters": [ "\\", "_", "\u001c" ], "capslock": false },
    { "pos": "Win_L", "shortcutPos": "\\", "letters": [ "\\", "|", "\u001c" ], "capslock": false },

So Ro is somehow showing as VolumeUp and Yen as Win_L.

Either there are some issues in how these are handled, or they need to be turned into aliases for klc.