Further fixes of how passthrough items are handled

* When evaluating a plan, only give the pass-through treatment to
  items if the step they're part of was actually executed
* When marking a step "complete", ignore passthrough items

src/client/site/news_page/news_page.jade

@@ -10,6 +10,19 @@
         .view__adsense
 
     .right
+        section
+            h3 2016-04-16
+            .panel
+                p.
+                    I've been working on adding a new mod, and I ran across a bug which has been in the system for a
+                    while now, but which will cause serious problems with a lot of the recipes in the new mod. So, I put
+                    the mod aside for a bit to fix it.
+                p.
+                    The bug was that when you are making something like an <a
+                    href="/browse/forge_multipart/oak_wood_cover">Oak Wood Cover</a> the <a
+                    href="/browse/forge_multipart/stone_saw">saw</a> wouldn't be part of the crafting plan. This isn't
+                    such a big deal for most things, but for this new mod, it would have been a major problem.
+
         section
             h3 2016-04-14
             .panel