Changed library location.

Signed-off-by: Anton Landberg <git@atnon.se>
Reworked pointing part.

Reworked in order to only trigger onTouch events for the actual control circle.
The radius values are now on the range [0,1].
Should be pretty generic concerning image size and screen size,
since the values are now normalized.

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Signed-off-by: Anton Landberg <git@atnon.se>