Igcs 203 ar drone tilt control

The important change is the sendMoveCommand method in the iGCS/Comm/Interfaces/iGCS/iGCSMavLinkInterface.* files.  The rest was to support testing this new method.
I'm good with that

On Tue, Nov 25, 2014 at 4:21 PM, Andy Brown <notifications@github.com>
wrote:

> In iGCS/UserInterface/ViewControllers/ArDroneViewController.m:
>
> > +        self.thrust = 0;
> > +}
> > +
> > +- (void) plusThrust {
> > +    self.thrust = 500;
> > +}
> > +
> > +- (void) minusThrust {
> > +    self.thrust = -500;
> > +}
> > +
> > +- (void) zeroThrust {
> > +    self.thrust = 0;
> > +}
> > +
> > +- (struct GCSMAVMove) quaternionToNormalizedPitchRollYawWithQuat:(CMQuaternion)quat {
>
> normalizedRotationAnglesFromQuaternion possibly? Thoughts?
>
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> <https://github.com/fightingwalrus/iGCS/pull/117/files#r20908105>.
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