core-image-ros-groovy-running-roscore: a core image to start roscore

This commit provides a recipe for a core image to start roscore, and
also tunes the README.

README

@@ -123,7 +123,7 @@ REDISTRIBUTIONS
 The log4cxx recipe originated from the recipe in the OpenEmbedded (Classic) Development
   (cf. http://cgit.openembedded.org/openembedded/tree/recipes/log4cxx)
   licensed with the MIT License.
-The core-image-ros recipe originated from the core-image-minimal recipe in OpenEmbedded Core
+The core-image-ros-* recipes originated from the core-image-minimal recipe in OpenEmbedded Core
   (cf. http://cgit.openembedded.org/openembedded-core/tree/meta/recipes-core/images/core-image-minimal.bb)
   licensed with the MIT License.
 The libtinyxml recipe originated from the recipe in the OpenEmbedded meta layer

recipes-core/images/core-image-ros-groovy-running-roscore.bb

+DESCRIPTION = "A small image just capable of starting roscore."
+
+IMAGE_INSTALL = "packagegroup-core-boot ${ROOTFS_PKGMANAGE_BOOTSTRAP} ${CORE_IMAGE_EXTRA_INSTALL}"
+
+IMAGE_LINGUAS = " "
+
+LICENSE = "MIT"
+
+inherit core-image
+
+IMAGE_ROOTFS_SIZE = "8192"
+
+# remove not needed ipkg informations
+ROOTFS_POSTPROCESS_COMMAND += "remove_packaging_data_files ; "
+
+IMAGE_INSTALL += "packagegroup-core-ssh-openssh \
+  roslaunch \
+"