Tries to integrate the velodyne_lidar/MultilevelLaserScan.h format.

Still problems, opening angle is not 90 degree and the calculation of the vertical angle for the multilevel-laser-scan format is still wrong.
Testscript: bundles/spacebot/scripts/simulation/test_360_laserscanner.rb.

Conflicts:

	mars_core.orogen
created a second non working implementation of the velodyne ;-)
Fixed memory violation

MarsArguments argument was given to the mars thread as pointer. The
thread then used this one, while the calling function might already
been terminated. As argument was allocated on the stack before,
this was a memory violation.
fixed possible memory violation.

QApplication gets the argc as reference. It might be, that it is
saved and used later on. (At least in QT 4 there was a problem like this)
fixed wrong sizeof()

Should make no difference, but lets fix it anyway...
Added new task for the RttMultiLevelLaserRangeFinder