long overdue header cleanup

buffer/buffer_init_write.c

@@ -1,5 +1,5 @@
 #include <unistd.h>
-#include <buffer.h>
+#include <libowfat/buffer.h>
 
 int buffer_init_write(buffer* b, int fd, char* y,size_t ylen) {
   if (fd==-1) return -1;