Fix first section in doc/zorba/ft_intro.dox.
Fix first section in doc/zorba/ft_intro.dox.

28msec/zorba,bgarrels/zorba,28msec/zorba,bgarrels/zorba,bgarrels/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,28msec/zorba,bgarrels/zorba,bgarrels/zorba,28msec/zorba,bgarrels/zorba,28msec/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,cezarfx/zorba