project file fixes

[mardrone] / mardrone / ardrone.qrc

<RCC>
    <qresource>
        <file>ardrone.qml</file>
        <file>BarGauge.qml</file>
        <file>ConfigDialog.qml</file>
        <file>JoyStick.qml</file>
        <file>joybox.png</file>
        <file>joyknob.png</file>
    </qresource>
</RCC>