robot-model: updating to 1.10.20
slam-gmapping: updating to 1.3.4
catkin: updating to 0.5.89
ros-comm: updating to 1.10.11
slam-gmapping: updating to 1.3.5
rospack: updating to 2.1.24
octomap: updating to 1.6.8
packagegroup-ros-world: removing urdfdom-headers (re-addressing #177).

The urdfdom-headers package was removed from packagegroup-ros-world
in #182, because it is an empty package and causes the image
creation to fail (cf. #177).
In commit 9ff8d1f7e9130dca1455651bd5d58875fc95c30e, urdfdom-headers
was added again while adding new ROS packages to
packagegroup-ros-world. As part of the manual regression testing,
executing 'bitbake packagegroup-ros-world' for the different qemu
architectures, but not building full images, this problem has
slipped through the regression testing the last few months. This
issue was reported on the meta-ros mailing list by Parag
Batavia [1].

[1] https://groups.google.com/forum/#!topic/meta-ros/VZo3IUsI_48
pcl: adding patch to compile with boost 1.56 (resolves #293)
Merge pull request #294 from bulwahn/updates

updates and minor tuning at the beginning of September 2014