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>

Updates to ROS indigo in August 2015

catkin: drop catkin_find from package (resolves #351)

catkin-runtime: including catkin_find (resolves #349)

catkin-runtime: adding support for native version (resolves #338)

Various fixes

Minor updates to ROS Indigo

The openslam_gmapping commit

https://github.com/ros-perception/openslam_gmapping/commit/07b0c7ef62c0e28296c9618495314af1f43e5693



corrects the license information of that package, and hence, we
adjust the recipe in meta-ros accordingly.

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