Revert "Merge pull request #26 from vrabaud/fix_xacro"
Revert "Merge pull request #26 from vrabaud/fix_xacro"

Breaks groovy (xacro no catkin package), but will be required from hydro on

This reverts commit 321424a634a309ea9c284cf027074cdeda2a3c67, reversing
changes made to 383d285e01997e585bfa731525ce5f17a6cc3165.

sosswald/nao_robot,suryaambrose/naoqi_bridge,ros-naoqi/naoqi_bridge,ros-naoqi/nao_robot,uchile-robotics-forks/nao_robot,suryaambrose/naoqi_bridge,kochigami/nao_robot,kochigami/nao_robot,lsouchet/naoqi_bridge,ArthurVal/RIDDLE_naoqi_bridge,vrabaud/naoqi_bridge,k-okada/nao_robot,ArthurVal/RIDDLE_naoqi_bridge,vrabaud/naoqi_bridge,DAIChengkai/nao_robot,uchile-robotics-forks/nao_robot,nlyubova/nao_robot,DAIChengkai/nao_robot,lsouchet/naoqi_bridge,Asiron/nao_robot,nlyubova/nao_robot,Asiron/nao_robot,sosswald/nao_robot,ros-naoqi/nao_robot,k-okada/nao_robot,ros-naoqi/naoqi_bridge