Fix autoplay & add initialFrame prop

[maciekpastuszka]

Example code to issue reproduce: <Rotation cycle={true} autoPlay={this.state.autoPlay} onChange={(frame) => { if (frame === 10) { this.setState({ autoPlay: false })

Expected behavior: Start initially autoPlay then stop spinning after 10 frame.

Issue: The prop autoPlay changes to false, method stop fires but spinning doesn't stop because of async setTimeout in nextFrame method

Also I added initialFrame prop

[maciekpastuszka]

@andrepolischuk Could you take a look :)