The native log4cxx recipe is required for the recipe
dynamic-reconfigure-native.

The python-rospkg-native rdepends on python-xml-native, and
python-native provides this without any further ado.

The current catkin requires catkin_pkg >= 0.1.12 as indicated in
https://github.com/ros/catkin/blob/groovy-devel/package.xml

.
See discussion in #99.

lb: minor tweaking and commit message rewording

Signed-off-by: Víctor Mayoral Vilches <v.mayoralv@gmail.com>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@oss.bmw-carit.de>

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@oss.bmw-carit.de>

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@oss.bmw-carit.de>

using BBCLASSEXTEND = "native" and removing the separate native package files (thanks to Stefan Herbrechtsmeier for this hint)

improving dependencies in the python recipes; simplifying core-image-ros after dependencies are improved

tried to add python-vcstools via dependency in python-rosinstall but it does not do and then added it the core-image instead; tuned layout and order in core-image

adding the recipe python-vcstools, as now that the python recipes do not use setuptools to get all the dependencies write we need further recipes

adding the setuptools class from openembedded classic; adjusting the packages; adding legal statement