Adjusting Start/End Handles programmatically

[elementsrtyte]

It would be very helpful to provide some methods on TrimmerView that allows us to pass in a 'start' or 'end' CMTime to TrimmerView that allows us to configure the default starting/ending times of the trimmer.

Something with a signature similar to this would be great...

public func updateLeftHandlePosition(time: CMTime) {
...
}
public func updateRightHandlePosition(time: CMTime) {
...
}

Thanks

[HHK1]

There has been a similar request here #17, so I'm going to close this issue as a duplicate.

As mentioned in the first issue: You should be able to do something similar to the positionBar. I currently don't have the time to work on this. Feel free to open a PR if you decide to implement it.