Finish the Set/ implementation

doc/formats/index.md

@@ -81,7 +81,7 @@ remake.
     * `*.TXT`
 * [`Obj/`](obj.md)
     * `*.obj` # must be visual data of some sort, one per placeable map object?
-* `Pic/`
+* [✓] `Pic/`
     * `*.pcx` # Standard .pcx format
 * `RandomMaps/`
     * `*.chk` # multiplayer. worry about these another day
@@ -89,7 +89,7 @@ remake.
 * `Save_G/`
     * `*.sav` # savedata, gzip-compressed, custom format
     * `*.txt` # Seems to be a copy of one of Maps/*.txt
-* [`Sets/`](sets.md)
+* [✓] [`Sets/`](sets.md)
     * `Data.chk` # checksums? Mentions all the .set files
     * `*.set` # plain text, related to maps. Editor has a concept of map sets, which these must be
 * [✓] `SMK/`
@@ -119,4 +119,4 @@ Phew.
     * [`Maps/*.txt`](maps.md#associated-txt-file)
     * [`Sets/*.set`](sets.md)
 * [`Sounds/wh40k.ds`](sounds.md)
-    * `Wav/*.wav`
+    * `Wav/*.wav`