TIFF Support

[mikecx]

Any chance for future TIFF support?

[willnorris]

sure, wouldn't be too hard with the golang.org/x/image/tiff package. You wanna take a stab at it?

[mikecx]

My Go knowledge is pretty lacking but I can certainly give it a try in a few days.

[mikecx]

#109 - Hopefully this does it, let me know if it needs changes.

[mikecx]

Looks like I misunderstood how this was working and should have tested first. If you pass in a url to a tiff image it will actually work just fine. If anyone needs tiff output it's super easy to add using the tiff package listed above.

[willnorris]

Well, it only sort of works. If you pass it a TIFF image, it will always get passed through without any transformation, which is the same thing that happens with any unsupported format (image or otherwise). Your point in #109 about the lack of good browser support for TIFF is interesting, and I like the idea of converting to JPEG by default. Plus, adding proper TIFF support should also allow us to do other transformations on these images.

[willnorris]

fixed in c1a9dab