forbid unsafe code

dit/src/main.rs

@@ -1,3 +1,5 @@
+#![forbid(unsafe_code)]
+
 use libdit::libdit::dit_struct_to_unix;
 pub use libdit::libdit::unix_to_dit_string;
 use libdit::libdit::Dit;

libdit/src/lib.rs

@@ -1,3 +1,5 @@
+#![forbid(unsafe_code)]
+
 pub mod libdit {
 	use std::process::exit;
 	use std::str::FromStr;

libstardit/src/lib.rs

@@ -1,3 +1,5 @@
+#![forbid(unsafe_code)]
+
 extern crate chrono;
 
 pub mod libstardit {

stardit/src/main.rs

@@ -1,3 +1,5 @@
+#![forbid(unsafe_code)]
+
 pub use libstardit::libstardit::unix_to_stardit;
 pub use std::time::{SystemTime, UNIX_EPOCH};