Add support for RGB8 (#116)
Add support for RGB8 (#116)

* Style cleanup in showimage.cpp.

Just make the style consistent throughout the file.

Signed-off-by: Chris Lalancette <281cd07d7578d97c83271fbbf2faddb83ab3791c@osrfoundation.org>

* Add rgb8 support to showimage.

This is useful so that we can use showimage as a more generic
image viewer for ROS2 images.

Signed-off-by: Chris Lalancette <281cd07d7578d97c83271fbbf2faddb83ab3791c@osrfoundation.org>

* Make uncrustify happier.

Signed-off-by: Chris Lalancette <281cd07d7578d97c83271fbbf2faddb83ab3791c@osrfoundation.org>

ros2/demos,ros2/demos,ros2/demos,ros2/demos