Peter Österlund

Handle CENTER_VERTICAL tooltip gravity.

1

When using CENTER_VERTICAL tooltip gravity, place the tooltip vertically centered relative to the view it is referring to. Fixes issue #59.

getYForTooTip does not handle CENTER_VERTICAL gravity

1

I think the getYForTooTip method should look something like this: ``` private int getYForTooTip(int gravity, int toolTipMeasuredHeight, int targetViewY, float adjustment){ int y; if ((gravity & Gravity.TOP) == Gravity.TOP) {...