merge versioning, fix bug todo

reader/src/error.rs

@@ -0,0 +1,12 @@
+#[derive(Debug, thiserror::Error, PartialEq, Eq)]
+pub enum ReaderError {
+    #[error("stream input error {0}")]
+    StreamInput(String),
+    //
+    #[error("etag: expected ETag {0} does not match computed ETag {1}")]
+    VerifyError(String, String),
+    #[error("Bad checksum: Want {0} does not match calculated {1}")]
+    ChecksumMismatch(String, String),
+    #[error("Bad sha256: Expected {0} does not match calculated {1}")]
+    SHA256Mismatch(String, String),
+}