Add colored text (not only colored chat).

Add documentation, move files to a proper place and avoid memory leaks.
Make it work with most kind of texts, and allow backgrounds too.

src/cguittfont/CGUITTFont.h

@@ -1,6 +1,7 @@
 /*
    CGUITTFont FreeType class for Irrlicht
    Copyright (c) 2009-2010 John Norman
+   Copyright (c) 2016 Nathanaël Courant
 
    This software is provided 'as-is', without any express or implied
    warranty. In no event will the authors be held liable for any
@@ -33,6 +34,8 @@
 
 #include <irrlicht.h>
 #include <ft2build.h>
+#include <vector>
+#include "util/enriched_string.h"
 #include FT_FREETYPE_H
 
 namespace irr
@@ -258,6 +261,10 @@ namespace gui
 			virtual void draw(const core::stringw& text, const core::rect<s32>& position,
 				video::SColor color, bool hcenter=false, bool vcenter=false,
 				const core::rect<s32>* clip=0);
+			
+			virtual void draw(const EnrichedString& text, const core::rect<s32>& position,
+				video::SColor color, bool hcenter=false, bool vcenter=false,
+				const core::rect<s32>* clip=0);
 
 			//! Returns the dimension of a character produced by this font.
 			virtual core::dimension2d<u32> getCharDimension(const wchar_t ch) const;