fix hardcoded start of fgfs and terrasync, use system environment variables for linux distro independence
First stab at JSBSim interface, compiling, operational, but needs the correct startup folders and arguments
Merge pull request #242 from thomasgubler/archlinux

fix hardcoded start of fgfs and terrasync, use system environment variables for linux distro independence
Potential Linux start fix
Merge branch 'master' of github.com:mavlink/qgroundcontrol
Merge branch 'master' of github.com:mavlink/qgroundcontrol into sensor_hil
Merge branch 'sensor_hil' of github.com:mavlink/qgroundcontrol into sensor_hil