Add ability to setup "hide on touch outside"

[Ekalips]

Please, add ability to hide not on tip click, but on click outside.

[vipulshah2010]

Use following workaround till native support is not added in library.

1. Declare private View mTooltipView; in activity
2. Implement onDisplay and onHide from ViewTooltip

.onDisplay(tooltipView -> mTooltipView = tooltipView)
                   .onHide(tooltipView -> mTooltipView = null)

3)override dispatchTouchEvent in activity.

@Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        if (mTooltipView != null) {
            ViewGroup parent = (ViewGroup) mTooltipView.getParent();
            if (parent != null) {
                parent.removeView(mTooltipView);
                mTooltipView = null;
            }
            return true;
        }
        return super.dispatchTouchEvent(ev);
    }