adds simulation with gazebo:
-start with roslaunch tas_simulator startSimulation.launch
-needs: sudo apt-get install  ros-indigo-desktop-full hector*
-uses adapted ackermann_vehicle:
	-added hokuyo scanner
	-added imu
-bridge between ackermann_cmd and cmd_vel, thus tas_navigation stack could be used (not testet)
-starts ps3 joystick driver for manual steering (using turtlebot-teleop code)
	-needs "sixad --start" or any other service providing /dev/js0
-3d model of the 3rd Floor
	-more details
		-doors
		-obstacles
	-verify (just have a look at that floor - currently just rebuild using 2d-map)

-2do:
	-add 2nd scanner (rear scanner)
	-add magnetic sensor
	-adapt parameters:
		-weight
		-maximum steering angle
		-check track
		-parameters of engine
		-friction
		-maximum speed
	-add bumpers (by now car climbs walls till it flips over)
	-add odometry
	-check whats really needed in "navigation" folder