update pip packages, python27 is required since groovy

Signed-off-by: Ruben Smits <ruben@intermodalics.eu>
add (empty) entries for orocos toolchain dependencies on osx

Signed-off-by: Ruben Smits <ruben@intermodalics.eu>
add readline entries for homebrew

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
ruby: fixed alphabetic item order

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
homebrew: fix indentation and item order

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
macports: update and add missing macport entries according to https://github.com/kyonifer/ros-macports/blob/gen-scripts/config/rosdep-osx-macports.yaml

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
fix rosdep issues

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
more ordering fixes

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
Merge pull request #3439 from smits/master

Updates and missing rosdep entries for osx