Support JPEG restart markers

[netdown]

Hi,
I'm getting this unknown JPEG marker error with files which seem to be ok, editing softwares like PS and others open it without a problem. Isn't there a way to ignore this error or something to be able to open theese images? (decoder.js line 757)

[derrell]

I'm seeing this too. More specifically, it is JPEG restart markers (ffd1 to ffd7) that are causing the problem. This checked stackoverflow response provides the likely fix to this problem: http://stackoverflow.com/questions/8748671/jpeg-restart-markers

[benwiley4000]

Thanks @netdown for flagging the issue and @derrell for linking to that stackoverflow answer specifying how it could be solved. We'll accept a PR that resolves this one! 😄