include contributions from pull request #364 properly

This commit adds recipes for rosbridge_suite and its dependencies.
Its main content is based on the commits of pull request #364 by
Christoph Schultz.

As maintainer, Lukas Bulwahn just included the contributions
with a proper commit message, added the new packages to the
packagegroup-ros-world, and slightly improved the line breaking.

python-numpy: drop now superfluous bbappend file

In the meta-ros commit b6080314 (commit date: 2013-11-17) [1], we
add python-numpy_1.7.0.bbappend to provide python-numpy as native
package, as the version update to cv-bridge 1.10.14 needs that.

Coincidentally, Ross Burton added native support to the
python-numpy recipe in the meta-openembedded commit c13c5f40
(commit date: 2013-11-18) [2]. However, the existing bbappend in
meta-ros was still required for use with releases before commit
c13c5f40.

On 2014-01-14, the python-numpy recipe was moved from meta-oe to
openembedded-core (commit a4415f89 and 9bf355cc [3, 4]).
Now, on 2015-12-16, the python-numpy recipe was updated to 1.10.1
(commit 3c3932f3 [5]), and hence, our version-specific bbappend
file fails to apply.

As the native package addition is now in the recipe for over two
years (commit date: 2013-11-18), and we assume all users to work on
versions where the change has been included, we simply drop our now
superfluous bbappend file.

[1] https://github.com/bmwcarit/meta-ros/commit/b6080314504be62c8fbfcb1d583e688448a2f023
[2] http://cgit.openembedded.org/meta-openembedded/commit/?id=c13c5f40160d289bb62538a16900fed30621cb22
[3] http://cgit.openembedded.org/meta-openembedded/commit/?id=a4415f89e533a59ba358f8575d56216d3650e59e
[4] http://cgit.openembedded.org/openembedded-core/commit/?id=9bf355cceaec6ebacdcbcc35f9713ff73e1c85da
[5] http://cgit.openembedded.org/openembedded-core/commit/?id=3c3932f3560c898e32287c8733b61180685ee539



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

Updates in ROS indigo until mid of December

robot-state-publisher: adjust to new dependencies

The internal CI build detected that bitbake robot-state-publisher
fails after the recent version update. Hence, this commit adjusts
the dependencies to those dependencies stated in the package.xml.

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

Updates to ROS indigo until mid November 2015 

Updates to ROS indigo in October 2015

Added gst-plugins-good to DEPENDS line

Some of the gst-plugins-good modules were missing to setup a cam for some basic scenarios/tutorials. I added it so they'll be added to the default build set.

minor improvements to documentation and environment variables

README.md: use same installation guide for hydro and indigo (resolves…

As the installation guide for hydro and indigo only differs in
small details, the same wiki page is used for the hydro and indigo
distribution.

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