Move a bunch of unused files to old/ with names that are not case-insensitive-unique...

Move a bunch of unused files to old/ with names that are not case-insensitive-unique.  These files still contain some...

Original commit message from CVS:
Move a bunch of unused files to old/ with names that are
not case-insensitive-unique.  These files still contain some
useful information that needs to be merged into gstbin.sgml,
etc., so they shouldn't be deleted yet.
* docs/gst/tmpl/GstBin.sgml:
* docs/gst/tmpl/GstBuffer.sgml:
* docs/gst/tmpl/GstCaps.sgml:
* docs/gst/tmpl/GstClock.sgml:
* docs/gst/tmpl/GstCompat.sgml:
* docs/gst/tmpl/GstData.sgml:
* docs/gst/tmpl/GstElement.sgml:
* docs/gst/tmpl/GstEvent.sgml:
* docs/gst/tmpl/GstIndex.sgml:
* docs/gst/tmpl/GstStructure.sgml:
* docs/gst/tmpl/GstTag.sgml:
* docs/gst/tmpl/old/GstBin.sgml:
* docs/gst/tmpl/old/GstBuffer.sgml:
* docs/gst/tmpl/old/GstCaps.sgml:
* docs/gst/tmpl/old/GstClock.sgml:
* docs/gst/tmpl/old/GstCompat.sgml:
* docs/gst/tmpl/old/GstData.sgml:
* docs/gst/tmpl/old/GstElement.sgml:
* docs/gst/tmpl/old/GstEvent.sgml:
* docs/gst/tmpl/old/GstIndex.sgml:
* docs/gst/tmpl/old/GstStructure.sgml:
* docs/gst/tmpl/old/GstTag.sgml: