Fix byte offset tracking in text-based libraries and switch externall…

…y managed mzpaf library (#75)

* Shift to using externally controlled mzpaf library

* Fix read seeking and byte the bullet for offset tracking

* schema moved

.github/workflows/validate-json-schemas.yml

@@ -17,7 +17,7 @@ jobs:
         pip install jsonschema==3.2.0
     - name: Get JSON Schema schema
       run: |
-        curl http://json-schema.org/draft-07/schema# -o schema-draft-07.json
+        curl -k -L http://json-schema.org/draft-07/schema# -o schema-draft-07.json
     - name: Validate peak annotation schema
       run: |
         jsonschema \