Fix GC/Wii linker error

Add example program (Currently only targets wii)

include/Athena/DNAYaml.hpp

@@ -7,10 +7,6 @@
  * Any changes to the types or namespacing must be reflected in 'atdna/main.cpp'
  */
 
-#ifdef GEKKO
-#include <stdlib.h>
-#include <limits.h>
-#endif
 #include <string.h>
 #include <yaml.h>
 #include <utf8proc.h>

include/gekko_support.h

@@ -21,6 +21,7 @@ long long
 strtoq(const char *nptr, char **endptr, int base);
 unsigned long long
 strtouq(const char *nptr, char **endptr, int base);
+/* devkitppc doesn't properly declare strtof for some reason */
 float
 strtof(const char *string, char **endPtr );
 #ifdef __cplusplus