Version 1.1
Changes:
- `parse` now returns an extra table with parse error locations. This
is only additional information, the parse behaviour itself hasn't
changed.
- `parse` now handles keys before the first section header gracefully,
returning a parse error instead of erroring.
- `save` throws a better error if a provided section is not table-like
(supports indexing and `next`)
- The `io` backend will explicitly close a file after writing, not
waiting for garbage collection. (PR #5, thanks Lukas)
Unit tests were also added. Given the release schedule that shouldn't
catch many bugs, but at least it's something.