Convert RecordReference.md to ComponentReference.pod

That .pod file will now be converted to .html using the same style as
the individual local documents that it links to.

The dbdToHtml output files now include a header and footer that link to
the ComponentReference.html file (they started pointing to the original
RecordReference.html but that was broken on most people's builds because
we weren't converting that from the original Markdown version).

This commit also adjusts documentation/Makefile to use the build system
properly, and reorders the Doxygen main page index.

modules/database/src/tools/dbdToHtml.pl

@@ -157,7 +157,7 @@ else { # Regular HTML
 my $pod = join "\n",
     '=for html <div class="pod">',
     '',
-    'L<EPICS Reference Manual|RecordReference>',
+    'L<EPICS Component Reference Manual|ComponentReference>',
     '',
     '=for html <hr>',
     '',
@@ -188,7 +188,7 @@ my $pod = join "\n",
     } $dbd->pod,
     '=for html </div><hr>',
     '',
-    'L<EPICS Reference Manual|RecordReference>',
+    'L<EPICS Component Reference Manual|ComponentReference>',
     '';
 
 $podHtml->force_title($podHtml->encode_entities($title));