Some updates for SearchEngines

[kurakin]

1. Mail.ru is using "windows-1251" encoding for now.

2. New search engine nigma.ru.

3. New search engine qip.ru.

4. Removed duplicated key "nova.rambler.ru"; the first is correct.

5. Added backlink field for Yandex Images.

Patch against svn1184:

diff -Ebaur piwik-svn1184.orig/core/DataFiles/SearchEngines.php piwik-svn1184/core/DataFiles/SearchEngines.php
--- piwik-svn1184.orig/core/DataFiles/SearchEngines.php	2009-06-02 00:02:34 +0400
+++ piwik-svn1184/core/DataFiles/SearchEngines.php	2009-06-05 22:19:12 +0400
@@ -827,7 +827,7 @@
 	   "www.maailm.com"			=> array("maailm.com", "tekst"),
 
 		// Mail.ru
-		"go.mail.ru"			=> array("Mailru", "q"),
+		"go.mail.ru"			=> array("Mailru", "q", "search?q={k}", "windows-1251"),
 		
 		// Mamma
 		"mamma.com"			=> array("Mamma", "query"),
@@ -907,6 +907,10 @@
 		// Nifty
 		"search.nifty.com"              => array("Nifty", "q"),
 
+		// Nigma
+		"www.nigma.ru"			=> array("Nigma", "s", "index.php?s={k}"),
+		"nigma.ru"			=> array("Nigma", "s", "index.php?s={k}"),
+
 		// Nomade
 		"ie4.nomade.fr"			=> array("Nomade", "s"),
 		"rechercher.nomade.aliceadsl.fr"=> array("Nomade (AliceADSL)", "s"),
@@ -945,6 +949,10 @@
 		// Postami
 		"www.postami.com" 		=> array("Postami", "query"),
 		
+		// qip
+		"start.qip.ru"			=> array("qip.ru", "query", "search?query={k}"),
+		"search.qip.ru"			=> array("qip.ru", "query", "search?query={k}"),
+
 		// Quick searches
 		"data.quicksearches.net"	=> array("QuickSearches", "q"),
 		
@@ -958,7 +966,6 @@
 		"nova.rambler.ru"           => array("Rambler", "query", "search?query={k}"), 
 		"search.rambler.ru" 		=> array("Rambler", "words"),
 		"www.rambler.ru"            => array("Rambler", "words"),
-		"nova.rambler.ru" 			=> array("Rambler", "q"),
 
 		// Reacteur.com
 		"www.reacteur.com"		=> array("Reacteur", "kw"),
@@ -1147,7 +1154,7 @@
 		"www.ya.ru" 			=> array("Yandex", "text"),
 	
 		// Yandex Images
-		"images.yandex.ru"		=> array("Yandex Images","text"),
+		"images.yandex.ru"		=> array("Yandex Images", "text", "yandsearch?text={k}"),
 		
 		// Yasni
 		"www.yasni.de"                  => array("Yasni", "name"),

[matt]

(In [1190]) adding few search engines fixes #755