Doc search: update to version 2.15, use it in the "site:" part (issue 5530043)

[pkx166h]

Reviewers: ,

Message:
Added Pavel as a CC in case there are any comments from anyone - then he
can see them

Description:
Doc search: update to version 2.15, use it in the "site:" part

site:lilypond.org/doc/v2.15 means that we want to look only under that
directory.  Leading plus doesn't force the exact search anymore.

Please review this at http://codereview.appspot.com/5530043/

Affected files:
  M Documentation/search-box.ihtml


Index: Documentation/search-box.ihtml
diff --git a/Documentation/search-box.ihtml b/Documentation/search-box.ihtml
index  
d789109484afc0dd0fb1d6a32302f5731205f468..1c9ceb4e7a39c28dd1f9b6654fc6986b54d9e873  
100644
--- a/Documentation/search-box.ihtml
+++ b/Documentation/search-box.ihtml
@@ -1,11 +1,11 @@
 <form action="http://google.com/search";
       method="get"
       name="search"
-      onSubmit="search.q.value='site:lilypond.org +v2.14 '
+      onSubmit="search.q.value='site:lilypond.org/doc/v2.15 '
                + search.brute_query.value"
-      onMouseMove="search.q.value='site:lilypond.org +v2.14 '
+      onMouseMove="search.q.value='site:lilypond.org/doc/v2.15 '
                   + search.brute_query.value"
-      onKeyUp="search.q.value='site:lilypond.org +v2.14 '
+      onKeyUp="search.q.value='site:lilypond.org/doc/v2.15 '
               + search.brute_query.value">
   <input type="hidden" name="btnG" value="Google Search">
   <input type="text" name="brute_query" onfocus="this.value=''"  
value="Search">