Version 1.5.1

Added dynamic memory management for shutters (functions in shutter.c).
Code is now much easier to tailor to specific needs and works better in the limited RAM of routers.
Memory leaks were not found by Valgrind Memcheck.

shutter.h

@@ -18,6 +18,7 @@ typedef struct shutter {
   minitime down;          //time of lowering
   byte rolltime_down;     //measured in seconds, measured when the shutter is rolling down (usually faster than rolling up)
   byte percentage;        //the percentage to which the shutter is to be lowered
+  struct shutter *next;
 } shutter;
 
 typedef enum buttons {
@@ -27,4 +28,8 @@ typedef enum buttons {
   prev,
   next
 } buttons;
+
+shutter * create_shutter (byte ch, byte rolltime_down);
+void append_shutter (shutter **head, shutter *new_shutter);
+void free_shutters (shutter * head);
 #endif //_SHUTTER_H_