animateTo support reverse Rotation direction

[deyihu]

fix #851

   map.setView({
                bearing: -178
 })
map.animateTo(
                {
                    bearing: 177,

                    // callName: "setAzimuthalAngle",
                }, {
                duration: 1000,
                counterclockwise: true
            },
                frame => {
                    console.log(frame);
                }
)

[fuzhenn]

感觉可以把reverse: true 改成 counterclockwise: true，意义会更明确。

[deyihu]

@fuzhenn 已经改好