Simplify tinygl API by removing rotate options and using rotated font instead

apps/ir_grab2/ir_grab2.c

@@ -13,7 +13,7 @@
 #include "ir.h"
 #include "delay.h"
 #include "uint8toa.h"
-#include "../fonts/font3x5_1.h"
+#include "../fonts/font3x5_1_r.h"
 
 
 /* Define polling rate in Hz.  */
@@ -111,8 +111,8 @@ int main (void)
 
     system_init ();
     tinygl_init (LOOP_RATE);
-    tinygl_font_set (&font3x5_1);
-    tinygl_text_mode_set (TINYGL_TEXT_MODE_ROTATE_SCROLL_DOWN);
+    tinygl_font_set (&font3x5_1_r);
+    tinygl_text_mode_set (TINYGL_TEXT_MODE_SCROLL);
     tinygl_text_speed_set (MESSAGE_RATE);
 
     navswitch_init ();