Document installation of debians
Document installation of debians

Signed-off-by: Evgeni Raikhel <f85458431d26324487c02be81bf1e902412cb12e@intel.com>

IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense