Add section for ni back in, but comment it out.

Doc/lib.tex

@@ -77,6 +77,7 @@ add new extensions to Python and how to embed it in other applications.
 \input{libcopy}
 \input{libmarshal}
 \input{libimp}
+%\input{libni}
 \input{libparser}
 \input{libsymbol}
 \input{libtoken}

Doc/lib/lib.tex

@@ -77,6 +77,7 @@ add new extensions to Python and how to embed it in other applications.
 \input{libcopy}
 \input{libmarshal}
 \input{libimp}
+%\input{libni}
 \input{libparser}
 \input{libsymbol}
 \input{libtoken}