Implement new file device interface

This is a complete redesign of the file device. The most notable
addition is the ability to ascend and descend the file tree.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
index 98bc20f..80dcb54 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,7 @@
 #![feature(bigint_helper_methods)]
+#![feature(io_error_more)]
 #![feature(split_array)]
+#![feature(seek_stream_len)]
 
 use std::io::Read;
 use std::process::exit;