Include apt depencies in package.xml

[janmacro]

Hello,

It would be nice if the apt dependencies were declared directly in the orbbec_camera/package.xml file. Something like this would probably work:

<depend>libgflags-dev</depend>
<depend>nlohmann-json-dev</depend>
<depend>libgoogle-glog-dev</depend>

Then the package could be installed the usual way with rosdep.

[janmacro]

Thank you