Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/doc/efun/modify_command b/doc/efun/modify_command
new file mode 100644
index 0000000..eea6070
--- /dev/null
+++ b/doc/efun/modify_command
@@ -0,0 +1,21 @@
+SYNOPSIS
+ int|string modify_command(string cmd)
+
+DESCRIPTION
+ After set_modify_command(mob) was called for an interactive
+ object iob, all commands for that user will be passed to
+ mob->modify_command(), and the return will then be checked for
+ actions.
+
+ If the result is a string, it is the new command to execute
+ instead of the given one. Note that it is not possible to
+ make several commands from one this way!
+ If the result is a non-zero number, the given command is to
+ be ignored. In case of the closure/lfun setting this may
+ mean that the closure/lfun already executed it.
+ If the result is 0, the originally given command is to be
+ used.
+
+
+SEE ALSO
+ set_modify_command(E), hooks(C)