pin images are not pixel perfect

[Codier]

Hey Parker,
I notice that the round pin images (not including the red, location images) are not quite pixel perfect. Compare the smaller round pin images with the default images, The default ones look a lot sharper.
I don't know if this is easy to fix. And probably I am a bit picky.
Please close this issue if you think it is unnecessary to improve the quality of the pin image :)
Di