Change the parse module to be internal to the crate

There's no current need for users of this elf crate to implement their own
parsers, so this doesn't need to be public and clutter the public interface.

src/lib.rs

@@ -4,8 +4,8 @@ pub mod gabi;
 pub mod segment;
 pub mod section;
 pub mod symbol;
-pub mod parse;
 
+mod parse;
 mod utils;
 mod string_table;