bold attribute is back.

visibility of the cursor is not saved/loaded anymore.
scrolling up/down is fixed.
added RI and RIS sequences.
fixed cursor drawing bug.

config.h

@@ -1,7 +1,8 @@
 #define SHELL "/bin/bash"
 #define TAB    8
 
-#define FONT "fixed"
+#define FONT "6x13"
+#define BOLDFONT FONT"bold"
 #define BORDER 3
 #define LINESPACE 0 /* additional pixel between each line */