Made new icon for time trial

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/branches/irrlicht@4222 178a84e3-b1eb-0310-8ba1-8eac791a3b58

data/gui/License.txt

@@ -1,12 +1,14 @@
 All icons come from Open Game Art (art by onyum.com, comissionned by Bart Kelsey)
 * options_players & random_kart were tweaked by Marianne Gagnon
 
+
 Except :
+main_*.png icons, released under Creative-Commons BY-SA 3, By yeKcim (Anthony Carré)
+
+mode_tt, released under Creative-Commons BY-SA 3, incorporatings artwork from yeKcim and onyum.com
 
 Logo and Logo_slim : under CC-BY-SA 3.0+ by 'rastapax'
 
-main_*.png icons, released under Creative-Commons BY-SA 3, By yeKcim (Anthony Carré)
-
 difficulty_*.png icons, released under Creative-Commons BY-SA 3, By Conso (Constantin Pelikan)
 
 

data/gui/main.stkgui

@@ -10,7 +10,7 @@
             <icon-button id="network" width="128" height="128" icon="gui/main_network.png"
                     I18N="Main menu button" text="Networking"/>
             <icon-button id="challenges" width="128" height="128"
-                         icon="gui/main_challenges.png"
+                         icon="gui/challenge.png"
                          I18N="Main menu button"  text="Challenges"/>
         </buttonbar>