improving contributing documentation
Merge pull request #6239 from ros/update_docs

improving contributing documentation
jsk_roseus: 1.1.26-0 in 'hydro/distribution.yaml' [bloom]
Merge pull request #6243 from k-okada/bloom-jsk_roseus-0

jsk_roseus: 1.1.26-0 in 'hydro/distribution.yaml' [bloom]
adding package ira_photonfocus_driver to the indigo distribution.yaml file (for pull request)
moved into the right position (alphabetical order)
Merge pull request #6244 from iralabdisco/master

adding package ira_photonfocus_driver to the indigo distribution.yaml
multisense_ros: 3.3.6-0 in 'hydro/distribution.yaml' [bloom]
Merge pull request #6245 from carnegieroboticsllc/bloom-multisense_ros-10

multisense_ros: 3.3.6-0 in 'hydro/distribution.yaml' [bloom]
multisense_ros: 3.3.6-0 in 'indigo/distribution.yaml' [bloom]
Merge pull request #6246 from carnegieroboticsllc/bloom-multisense_ros-11

multisense_ros: 3.3.6-0 in 'indigo/distribution.yaml' [bloom]
Indigo requires gazebo2 branch
Merge branch 'master' of github.com:ros/rosdistro
homebrew/science/vtk options have changed. Update osx-homebrew to reflect changes