WIP: Temporary fix for parseJpeg() stub.

[abrander]

For others following develop, this may be handy if using said branch for parsing JPEG.

I don't fully understand the code, and this PR is basically untested. I'll close it when a real fix emerges.

[coveralls]

Pull Request Test Coverage Report for Build 1986966720

• 0 of 12 (0.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 52.783%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
imagemeta.go	0	12	0.0%
<!--	Total:	0	12	0.0%	-->

Files with Coverage Reduction	New Missed Lines	%
imagemeta.go	1	0%
<!--	Total:	1		-->

Totals
Change from base Build 1913214766:	-0.1%
Covered Lines:	2693
Relevant Lines:	5102

---

💛 - Coveralls

[evanoberholster]

Thanks for the PR. I am working on rewriting the imagemeta package. From testing different solutions it seems that the best would be to use:

exif function of

// Exif Function
exifFn := func(r io.ReadAt, header meta.ExifHeader) error {
}
// XMP Function
xmpFn := func(r io.Reader, header meta.XmpHeader) error {
}

This would mean that each Parsing function (JPEG, TIFF, CR2, CR3, NEF, CRW, etc.) would need to change to:

Scan(io.ReadAt, exifFn, xmpFn) error {
}

I would appreciate any suggestions that you have as this is definitely still a WIP.

[abrander]

This is not relevant after #33 - I'm closing it. Thanks for writing this library!