added sdformat install script and test
added gazebo install script and test
boost for gazebo
more gazebo dependencies
avoid \ in .travis.yml
use libogre-dev instead of libogre-1.8-dev which is 13.04 package
allow install_cmake_package search for already installed packages via pkg-config
Merge remote-tracking branch 'remotes/origin/master' into gazebo
skip gazebo test
Merge pull request #41 from braincorp/gazebo

Gazebo