title: How do I change the coordinate system in Compose.jl?
body: <p>I am using <a href="http://composejl.org/" rel="nofollow">Compose.jl</a>, and by default it seems that <code>(0,0)</code> corresponds to the top left corner of the image.  Is there any way to change the coordinate system within a piece of code such that <code>(0,0)</code> is instead the bottom left corner of the image, and increasing the <code>y</code> value moves up, not down?</p>