Comments on images

[tgross35]

• We use a lot of indirection for context, can likely remove some
• With svg, we should provide the option to (1) embed all images, (2) save them all to a path, (3) just follow what Altium does. This would save a lot of storage. We just need to store this information in our ctx when drawing
• Figure out why it seems like Altium makes the backgrounds white, see if we can improve this
• We convert embedded images to PNG but can get away without this