Remove re-export of is_same_file

Added a wrapper around this function that is deprecated.
Fixes #43.

src/lib.rs

@@ -122,7 +122,12 @@ use std::path::{Path, PathBuf};
 use std::result;
 use std::vec;
 
-pub use same_file::is_same_file;
+#[deprecated(since="1.0.7", note="please use `is_same_file` from `same_file` crate instead.")]
+pub fn is_same_file<P, Q>( path1: P, path2: Q)
+    -> io::Result<bool> where P: AsRef<Path>, Q: AsRef<Path> {
+    use same_file::is_same_file;
+    is_same_file(path1, path2)
+}
 
 #[cfg(test)] mod tests;