Add announcement for aileron and rudder trim

[MasterJake555]

TFM already announces elevator trim, this was a feature that was requested and added quite some time ago actually. It's proven helpful on jets, but I've been starting to fly more advanced aircraft that require rudder or aileron trim, such as the P-51 requiring 6 degrees of right rudder trim on takeoff. This is a must, because otherwise the plane will go into an uncontrollable ground loop, and, uh, I probably don't need to say why that could be a major problem. So I was wondering if you could add announcement of aileron and rudder trim so that we can adjust those if needed. This could also prove useful in flight in certain aircraft as well, for instance I know the TBM requires some right rudder trim on climb and left rudder trim during cruise to maintain coordinated flight.

[jfayre]

This should be very easy. I'll add it for beta 5