Changed FILE to use a vector as a buffer instead of raw pointers. This allows us to remove the large majority of unsafe blocks from the code

src/stdio/src/lib.rs

@@ -1,6 +1,7 @@
 //! stdio implementation for Redox, following http://pubs.opengroup.org/onlinepubs/7908799/xsh/stdio.h.html
 
 #![no_std]
+// For Vec
 #![feature(alloc)]
 #![feature(const_fn)]