The class-loader recipe is updated to 0.2.3 to be in line with
https://github.com/ros/rosdistro/blob/4551e7c32d1b34984410b79bc0ec36afe3d3d245/hydro/release.yaml.

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

The previous patch applied specifically in the recipe is
incorporated in the new version, and was removed from the recipe.

The class-loader 0.2.0 depends on console-bridge via cmake and not
via catkin as in version 0.1.28. This resolves issue #79.

The class-loader is used by the pluginlib.