Make sh_text and sh_stext optional. Since sh_text depends on pango, and we want a version of MadButterfly without Pango (lite version), we make sh_text and sh_stext optional. User can choice which one to enable.

#ifndef __MB_H_
#define __MB_H_

#include "mb_types.h"
#include "mb_redraw_man.h"
#include "mb_X_supp.h"
#include "mb_animate.h"
#include "mb_shapes.h"

#endif /* __MB_H_ */