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.
added iperf and python-visual
fixing type-o
ros_ethernet_rmp: 0.0.1-0 in 'indigo/distribution.yaml' [bloom]
sr_visualization: 1.3.1-0 in 'indigo/distribution.yaml' [bloom]
Merge pull request #5086 from DLu/bloom-wu_ros_tools-5

wu_ros_tools: 0.2.1-0 in 'hydro/distribution.yaml' [bloom]
Merge pull request #5087 from rctoris/bloom-ros_ethernet_rmp-0

ros_ethernet_rmp: 0.0.1-0 in 'indigo/distribution.yaml' [bloom]
Merge pull request #5088 from shadowmanos/bloom-sr_visualization-0

sr_visualization: 1.3.1-0 in 'indigo/distribution.yaml' [bloom]
espeak added to rosdep.
Merge pull request #5089 from rctoris/patch-4

espeak added to rosdep.
ordering fixed
navigation: 1.11.11-0 in 'hydro/distribution.yaml' [bloom]
navigation: 1.11.11-0 in 'indigo/distribution.yaml' [bloom]
Merge pull request #5090 from mikeferguson/bloom-navigation-8

navigation: 1.11.11-0 in 'hydro/distribution.yaml' [bloom]
added other versions of ubuntu which has python-visual package
Merge pull request #5091 from mikeferguson/bloom-navigation-9

navigation: 1.11.11-0 in 'indigo/distribution.yaml' [bloom]
rwi_ros: 1.1.0-0 in 'hydro/distribution.yaml' [bloom]