Add new arguments and better heuristics to $.fn.positionToSide.
positionToSide had trouble matching an element when positioned, say, to

either above/below another element, when the left or right of the

element would be scrolled off-screen. The "best guess" logic failed,

since it took into account both positions. Now it only computes the

position for the side it's checking, and leaves computing the other axis

until after it finds the best side.
There's some new options for controlling positioning as well. Instead of

just 'distance', there's now 'xDistance' and 'yDistance'. These both

fall back to using 'distance' if not specified.
'xOffset' and 'yOffset' control offseting the element in the direction

not matched up to a side. That's useful when you want to push the

element by a few pixels in one direction relative to the side.
Last, but not least, fitOnScreen now anchors things going off the top or

left of the scroll position as well, instead of just the bottom or

right.

Tested with tooltips and the comment dialog for images. They appeared as

they did before.
Turned on different sides (eventually all sides) and tested positions

at different window sizes and scroll positions and offsets and distances.

It always appeared where I expected and how I expected.