Add Marlin firmware. Has initial configuration for CoreXY and 1 servo.

Update CAD file with improved clearances for Pilot G2 cartridge clearances after first print.

Marlin Firmware/buildroot/share/git/firstpush

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+#
+# firstpush
+#
+# Push a branch to 'origin' and open the
+# commit log to watch Travis CI progress.
+#
+
+[[ $# == 0 ]] || { echo "usage: `basename $0`" 1>&2 ; exit 1; }
+
+MFINFO=$(mfinfo) || exit 1
+IFS=' ' read -a INFO <<< "$MFINFO"
+FORK=${INFO[1]}
+REPO=${INFO[2]}
+BRANCH=${INFO[5]}
+
+git push --set-upstream origin HEAD:$BRANCH
+
+OPEN=$(echo $(which gnome-open xdg-open open) | awk '{ print $1 }')
+URL="https://github.com/$FORK/$REPO/commits/$BRANCH"
+
+if [ -z "$OPEN" ]; then
+  echo "Can't find a tool to open the URL:"
+  echo $URL
+else
+  echo "Viewing commits on $BRANCH..."
+  "$OPEN" "$URL"
+fi