Added note about comments, from Christopher Petrilli.

Doc/lib/libcfgparser.tex

@@ -17,7 +17,9 @@ The configuration file consists of sections, lead by a
 with continuations in the style of \rfc{822}.  The optional values 
 can contain format strings which refer to other values in the same
 section, or values in a special \code{DEFAULT} section.  Additional
-defaults can be provided upon initialization and retrieval.
+defaults can be provided upon initialization and retrieval.  Lines
+beginning with \character{\#} are ignored and may be used to provide
+comments.
 
 For example: