#104 Add support for D5600

[Daniel Sonck]

The Nikkon D5600 camera has been out for quite some time now. It would be nice to have it included in the database. As far as I know it's the same as D5500 with only minor features added like touch.

[Eduardo Battaglia]

<camera>
        <maker>Nikon Corporation</maker>
        <maker lang="en">Nikon</maker>
        <model>Nikon D5600</model>
        <model lang="en">D5600</model>
        <mount>Nikon F AF</mount>
        <cropfactor>1.534</cropfactor>
    </camera>

[seebk]

Thanks!