changed the map model, added 6 beacons with simulated cameras
changed beacon camera resolution and made them 120 degree
made beacon cameras look slightly downward
added mucobot_simulator launch file to launch Rviz and Gazebo with one click
add gazebo model path variable to launcher scripts
temprorarily spawn turtlebot while our robot model is not ready
 - renamed the tower model to 'beacon' and moved it to separate folder
 - started working on the addition of game elements (cylinders, cups, etc.)
merge try
merge try 2