pe: expose original bytes field

There's no reason to make it private, this enable a user to peek inside
the raw structure and perform more complicated reading without holding
the original bytes around.

src/pe/mod.rs

@@ -39,7 +39,7 @@ use log::debug;
 /// An analyzed PE32/PE32+ binary
 pub struct PE<'a> {
     /// Underlying bytes
-    bytes: &'a [u8],
+    pub bytes: &'a [u8],
     authenticode_excluded_sections: Option<authenticode::ExcludedSections>,
     /// The PE header
     pub header: header::Header,