One more z-index tweak for top bar, a=chris

diff --git a/bin/arc_tool.php b/bin/arc_tool.php
index 8b99dec55..3c42ee316 100755
--- a/bin/arc_tool.php
+++ b/bin/arc_tool.php
@@ -599,13 +599,15 @@ class ArcTool implements CrawlConstants
         echo "php arc_tool.php info bundle_name //return info about\n".
             "//documents stored in archive.\n\n";
         echo "php arc_tool.php list //returns a list \n".
-            "//of all the archives in the Yioop! crawl directory.\n\n";
+            "//of all the archives in the Yioop! crawl directory, including\n".
+            "//non-Yioop! archives in the cache/archives sub-folder.\n\n";
         echo "php arc_tool.php mergetiers bundle_name max_tier\n".
             "//merges tiers of word dictionary into one tier up to max_tier\n";
         echo "\nphp arc_tool.php reindex bundle_name \n".
             "//reindex the word dictionary in bundle_name\n\n";
         echo "php arc_tool.php show bundle_name start num //outputs\n".
-            "//items start through num from bundle_name\n\n";
+            "//items start through num from bundle_name\n".
+            "//or name of non-Yioop archive crawl folder.\n\n";
         exit();
     }
 }
diff --git a/configs/config.php b/configs/config.php
index 6671ce3ca..d7bd7e146 100644
--- a/configs/config.php
+++ b/configs/config.php
@@ -308,6 +308,7 @@ $INDEXED_FILE_TYPES =
     array(
             "asp",
             "aspx",
+            "bmp",
             "cgi",
             "cfm",
             "cfml",
diff --git a/css/search.css b/css/search.css
index 89ffdc737..c2c098207 100755
--- a/css/search.css
+++ b/css/search.css
@@ -336,6 +336,7 @@ body.mobile
 .mobile .topbar,
 .mobile .landing-topbar
 {
+    z-index:1;
     background: #DDD;
     background: -moz-linear-gradient(top, #FFF 0%,#EEF 30%,#EEF 70%, #FFF 100%);
     background: -webkit-linear-gradient(top,