Original commit message from CVS:
rename the books so the discerning elements move up front
<book>
<bookinfo>
- <title>GStreamer Library Reference Manual (Core)</title>
+ <title>GStreamer Core Reference Manual</title>
</bookinfo>
<chapter id="gstreamer">
<title>GStreamer Core Library</title>
<book>
<bookinfo>
- <title>GStreamer Library Reference Manual (Libraries)</title>
+ <title>GStreamer Library Reference Manual</title>
</bookinfo>
<chapter id="gstreamer-libs">
<title>GStreamer Libraries</title>