First commit of partly-working reflow oven controller.

test/avr/pgmspace.h

@@ -0,0 +1,13 @@
+#ifndef _PGMSPACE_H_
+#define _PGMSPACE_H_
+
+#include <string.h>
+
+#define PROGMEM
+#define PGM_P const char *
+#define pgm_read_byte(x) (*(char *)(x))
+#define pgm_read_ptr(x) (*(char **)(x))
+#define strlen_P strlen
+#define memcpy_P memcpy
+
+#endif