Add scripts for updating the post-XX branches

scripts/merge.fish

@@ -0,0 +1,12 @@
+set original (git rev-parse --abbrev-ref HEAD)
+for x in (seq 99)
+    set previous (printf "post-%02i" $x)
+    set current (printf "post-%02i" (math $x + 1))
+	if not git checkout $current --quiet
+        break
+    end
+    if not git merge $previous --no-edit
+        break
+    end
+end
+git checkout $original --quiet