Merge pull request #3 from ros/master

updates from ros organisation
Add gazebo dep for Fedora
Add options/install_flags for boost/pcl.

 - as long as https://github.com/ros-infrastructure/rosdep/pull/304
   is not merged these will be ignored. If we merge this before rosdep
   is updated it will make testing that rosdep change slightly more easy.
 - install_flags will be used for `brew install`, but unlike options
   they are not checked for already installed packages
 - for boost --with-python see https://github.com/ros-infrastructure/rosdep/issues/330
 - for pcl --HEAD on Mavericks see
   - http://answers.ros.org/question/173654/cant-install-pcl-with-homebrew-on-osx-109-during-ros-hydro-installation/
   - https://github.com/ros/homebrew-hydro/issues/3
Make check_rosdep script more robust.
navigation_2d: 0.1.3-0 in 'indigo/distribution.yaml' [bloom]
Merge pull request #5013 from skasperski/bloom-navigation_2d-4

navigation_2d: 0.1.3-0 in 'indigo/distribution.yaml' [bloom]
Adding labust_common_msgs to documentation index for hydro. Removed labust_ros_pkg from documentation index for groovy. Changed tracking version for labust_ros_pkg in documentation index for hydro.
pal_vision_segmentation: 1.0.0-0 in 'hydro/distribution.yaml' [bloom]
Merge pull request #5015 from bmagyar/bloom-pal_vision_segmentation-1

pal_vision_segmentation: 1.0.0-0 in 'hydro/distribution.yaml' [bloom]
Adding s3000_laser to documentation name for Groovy
Adding s3000_laser to documentation name for Hydro
Merge pull request #5016 from RobotnikAutomation/master

Adding s3000_laser repository for Hydro and Groovy
Added jaco_ros to documentation index for hydro
rqt_common_plugins: 0.3.8-0 in 'indigo/distribution.yaml' [bloom]
Merge pull request #5017 from clearpathrobotics/master

Added jaco_ros to documentation index for hydro
Merge pull request #5018 from dirk-thomas/bloom-rqt_common_plugins-0

rqt_common_plugins: 0.3.8-0 in 'indigo/distribution.yaml' [bloom]
Reverted the groovy removal.
Merge branch 'master' of https://github.com/ros/rosdistro
Merge pull request #5014 from labust/master

Adding labust_common_msgs to documentation index for hydro
serial_utils: 0.1.0-0 in 'indigo/distribution.yaml' [bloom]