Added public files

Roughly added all public files. Probably missed some, though.
diff --git a/doc/sefun/query_once_interactive b/doc/sefun/query_once_interactive
new file mode 100644
index 0000000..c794223
--- /dev/null
+++ b/doc/sefun/query_once_interactive
@@ -0,0 +1,8 @@
+SYNOPSIS
+        int query_once_interactive(object obj);
+
+BESCHREIBUNG
+        Wahr, wenn <obj> interaktiv ist oder dies einmal war.
+
+SIEHE AUCH
+        remove_interactive(E)