USV visual model does not correspond to physical model

[jurajObradovic]

It turns out that visual model together with thruster location (usv_base) is rotated 90 degrees in relation to the physical model of the vehicle. Measured top speeds and drag coefficients are far larger in the side motion then in the forward motion.

[iche033]

the thruster rotation was adjusted in #179. We'll make another release soon. We'll keep the other params unchanged to avoid breaking people's code for now.

[mandicLuka]

The thruster rotation is fine, but the problem is that USV behaves very strangely. As @jurajObradovic said, we get top speed sideways that is many times larger then the top speed going forward