update manual TODO

docs/TODO

@@ -8,16 +8,6 @@ If you see modifications to this file in git status, IGNORE them and do not comm
 === Project Documentation ===
     - remember to periodically check the reference docs against new changes
 
-=== Simulation/Physics ===
-    - remove bodies on non closed orbits after they are a certain distance from
-        the root body, or bary-center
-    - add tests for each orbit type
-
-=== CTAGS ===
-    - previously we've used the Makefile to generate tags when building,
-        let's think about a way we can generate them without causing a conflict
-        for people who don't use ctags
-
 === Simulation Config Files ===
     - decide on an easier to read format, likely TOML or JSON
     - the config_loader module needs to be refactored, and likely needs some
@@ -28,6 +18,17 @@ If you see modifications to this file in git status, IGNORE them and do not comm
         - update remaining configs/* to new format
         - we need to keep an example with a binary system
         - relative coordinates for child bodies
+    - do we still need the --headless option now that we have a full test harness?
+
+=== Simulation/Physics ===
+    - remove bodies on non closed orbits after they are a certain distance from
+        the root body, or bary-center
+    - add tests for each orbit type
+
+=== CTAGS ===
+    - previously we've used the Makefile to generate tags when building,
+        let's think about a way we can generate them without causing a conflict
+        for people who don't use ctags
 
 === rendering ===
     - for starters, the minimum scaling of objects should be replaced with some