Added floating point formatting

+ Supports single and double precession formatting
+ Added Error handling from the formatting functions

src/main.rs

@@ -33,5 +33,8 @@ fn main() {
 
     let data = parse_bytes_from_input_arg(args.data).unwrap();
 
-    println!("{}", format.format_data(&data));
+    match format.format_data(&data) {
+        Ok(data_str) => println!("{}", data_str),
+        Err(e) => println!("Unable to format data: {}", e)
+    }
 }