Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/doc/concepts/files b/doc/concepts/files
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index 0000000..56e6e64
--- /dev/null
+++ b/doc/concepts/files
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+CONCEPT
+ files
+
+DESCRIPTION
+ As a wizard, you are working with files. Each file represents
+ the bulding plan for one or more objects (except text or doc files
+ of course).
+
+ The mudlib has a root, and when working with filenames, you
+ can always specify a full pathname from the root by starting
+ with a '/' (slash) at the beginning of the file name.
+
+ (oops, truncated - why when where did it happen?)
+
+SEE ALSO
+ objects(C), create(A), reset(A)