gazebo7: depend on ogre1.9 instead of 1.7 (#299)
gazebo7: depend on ogre1.9 instead of 1.7 (#299)

* gazebo7: depend on ogre1.9 instead of 1.7

* gazebo7 7.8.1_5 high_sierra bottle

* gazebo7 7.8.1_5 el_capitan bottle

* gazebo7 7.8.1_5 sierra bottle

osrf/homebrew-simulation,j-rivero/homebrew-simulation,scpeters/homebrew-simulation