typo

[colinta]

https://github.com/clayallsopp/geomotion/blob/master/lib/geomotion/cg_rect.rb#L105

    CGPoint.new(offset_x + self.width / 2, offset_y = self.height / 2)
    #
    CGPoint.new(offset_x + self.width / 2, offset_y + self.height / 2)

:-)

[clayallsopp]

Whoooops! Thanks!

Fixed and re-released.