Processing GIFs > 5MB results in error

[owaincuvelier]

Currently, Tachyon is not able to process GIFs over 5MB in size. The GIF can be uploaded, but as Tachyon is unable to generate its variants, images appear broken.

To handle this, it would be sufficient to detect GIFs greater than 5MB and have them bypass Tachyon processing altogether.

[ntwb]

Related: humanmade/tachyon#3

[joehoyle]

I think this can now be fixed with streaming responses in https://aws.amazon.com/blogs/compute/introducing-aws-lambda-response-streaming/, that requires us to remove Api Gateway though (probably not a bad thing).