Update for release. Move to scad.sh. Render all parts

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "scad/common"]
+	path = scad/common
+	url = https://git.sixteenmillimeter.com/modules/common.git

scad.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+bash scad/common/scad.sh scad/split_reel.scad "${@}"

scad/common

@@ -0,0 +1 @@
+Subproject commit 6c223d0fc67c1888429aee60cf68915b9bbaa1ca

scad/split_reel.scad

@@ -189,14 +189,14 @@ module logo_test () {
     }
 }
 
-PART = "split_reel_16mm_120m_B";
+PART = "16mm_120m_B";
 
-if (PART == "split_reel_16mm_120m_A") {
+if (PART == "16mm_120m_A") {
     split_reel("16mm", 120, "A");
-} else if (PART == "split_reel_16mm_120m_B") {
+} else if (PART == "16mm_120m_B") {
     split_reel("16mm", 120, "B");
-} else if (PART == "split_reel_super8_120m_A") {
+} else if (PART == "super8_120m_A") {
     split_reel("super8", 120, "A");
-} else if (PART == "split_reel_super8_120m_B") {
+} else if (PART == "super8_120m_B") {
     split_reel("super8", 120, "B");
 }