Added keyword module entry.

Doc/lib.tex

@@ -87,6 +87,7 @@ to Python and how to embed it in other applications.
 \input{libimp}
 \input{libni}
 \input{libparser}
+\input{libkeyword}
 \input{libcode}
 \input{libpprint}
 \input{libsite}

Doc/lib/lib.tex

@@ -87,6 +87,7 @@ to Python and how to embed it in other applications.
 \input{libimp}
 \input{libni}
 \input{libparser}
+\input{libkeyword}
 \input{libcode}
 \input{libpprint}
 \input{libsite}