Fab automation (#2)

- Use KiKit for fab automation
- Add splitflap scripts for exporting pcb pdfs, and switch to splitflap script for 3d rendering (for consistency with fab automation)
- Added support in 3d rendering scripts for soldermask & silkscreen colors, option to skip virtual components
- Added silkscreen to base and screen pcbs for commit and date info

scripts/annotate_image.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -e
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+FONT="$DIR/RobotoMono-Bold.ttf"
+
+# Make sure font exists
+ls "$FONT"
+
+set -v
+
+LABEL="`date --rfc-3339=seconds`\n`git rev-parse --short HEAD`"
+convert -background black -fill white -pointsize 12 -font "$FONT" -size 300x36 label:"$LABEL" -bordercolor black -border 3 $1 +swap -append $1
+