Fix link to crawler file

The `generate_file_links` method generates a `panel/links.html` file for
search engines to crawl.  When `panel/index.html` was converted to
`_panel.rhtml` in 4c5d4a0, the link to
`panel/links.html` was broken.  Though the value of this file may be
debatable, it definitely provides zero value if it is unreachable.  This
commit fixes the broken link.

This commit also renames the `generate_search_index` method to
`generate_file_links`, and renames `search_index.rhtml` to
`file_links.rhtml` so that it won't be confused with `search_index.js`,
which is entirely unrelated.

Author: jonathanhefner

lib/rdoc/generator/template/rails/_panel.rhtml

@@ -31,6 +31,6 @@
       </div>
     </div>
 
-    <a id="links" href="links.html">index</a>
+    <a id="links" href="/panel/file_links.html">index</a>
   </div>
 </nav>

…erator/template/rails/search_index.rhtml …enerator/template/rails/file_links.rhtmllib/rdoc/generator/template/rails/search_index.rhtml renamed to lib/rdoc/generator/template/rails/file_links.rhtml lib/rdoc/generator/template/rails/search_index.rhtml renamed to lib/rdoc/generator/template/rails/file_links.rhtml

@@ -102,7 +102,7 @@ def generate
     copy_resources
     @json_index.generate
     @json_index.generate_gzipped
-    generate_search_index
+    generate_file_links
     generate_class_tree
 
     generate_index_file
@@ -177,10 +177,10 @@ def generate_file_files
   end
 
   ### Generate file with links for the search engine
-  def generate_search_index
+  def generate_file_links
     debug_msg "Generating search engine index in #{@outputdir}"
-    templatefile = @template_dir + 'search_index.rhtml'
-    outfile      = @outputdir + 'panel/links.html'
+    templatefile = @template_dir + 'file_links.rhtml'
+    outfile      = @outputdir + 'panel/file_links.html'
 
     self.render_template( templatefile, binding(), outfile ) unless @options.dry_run
   end