Mention another fonttool to create Irrlicht fonts (by Armen).

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4717 dfc29bdd-3216-0410-991c-e03cc46cb475

tools/IrrFontTool/readme.txt

@@ -10,4 +10,7 @@ newFontTool:
 	different character sets, vector fonts and other operating systems than
 	just windows. It will create multiple image files and an .xml file 
 	containing meta information for the generated font.
-	You can find it as FontTool.exe in the /bin directory.
+	You can find it as FontTool.exe in the /bin directory.
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+	
+A third tool to create fonts for Irrlicht is web-based on maintained by armen:
+http://armen138.me/FontMapper/
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