SVG logging

[wjcarpenter]

I implemented SVG output via ESP logging and sent you a pull request (#30). This is really handy for making screen captures, which is otherwise tricky on the device. Attached are the SVG renderings of the test cases from main.c. Since the SVG output doesn't really understand the animations in some of the test cases, what you see in the SVG is usually the final result even though all of the graphical steps are in the SVG file.

samples.zip

[wjcarpenter]

Samples were rendered on a TTGO T-Display with screen dimensions of 135x240.