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
Merge pull request #5049 from vrabaud/master

opencv_candidate 0.2.3
Update branch
Update branch
rtmros_hironx: 1.0.18-1 in 'hydro/distribution.yaml' [bloom]
Merge pull request #5051 from esteve/update-class_loader-branch

Update branch
Merge pull request #5052 from esteve/update-pluginlib-branch

Update branch
Merge pull request #5053 from 130s/bloom-rtmros_hironx-0

rtmros_hironx: 1.0.18-1 in 'hydro/distribution.yaml' [bloom]
shadow_robot: 1.3.2-0 in 'indigo/distribution.yaml' [bloom]
Merge pull request #5054 from shadowmanos/bloom-shadow_robot-1

shadow_robot: 1.3.2-0 in 'indigo/distribution.yaml' [bloom]
rtmros_hironx: 1.0.18-2 in 'groovy/distribution.yaml' [bloom]
sr_config: 1.3.4-0 in 'indigo/distribution.yaml' [bloom]
Removed tu-darmstadt-ros-pkg source entries

During [RoboCup 2014](http://www.robocup2014.org) there might be several commits in these repos that cause failing devel jobs and will be cleaned up afterwards. Therefore we better switch it off until after the event to avoid build server load and email notifications.
Add libev-dev dep

Needed for mavros devel.
Merge pull request #5055 from 130s/bloom-rtmros_hironx-0

rtmros_hironx: 1.0.18-2 in 'groovy/distribution.yaml' [bloom]
Merge pull request #5056 from shadowmanos/bloom-sr_config-1

sr_config: 1.3.4-0 in 'indigo/distribution.yaml' [bloom]
Merge pull request #5057 from meyerj/patch-5

Removed tu-darmstadt-ros-pkg source entries