Added md5 checksum to file.js

[sixtus]

Really helpful and quite cheap.

[felixge]

I like this idea. What do you think about the following?

• Create a new form property this.checksum = false
• checksum can be set to md5, sha1, etc.
• If crypto is not compiled and checksum is not false, form emits an 'error' event for each upload
• Add a unit and a system test (if you come around with the above, I'm gonna add the tests for you)

Let me know what you think!

[sixtus]

Anything that saves me from rereading the file to compute the checksum is fine with me ;-)

[felixge]

Yeah, I was mainly asking if you have the time to take this patch a level further. I don't need checksums right now, so I probably won't get to it anytime soon.

[dmmalam]

This would be super useful!

[masterkain]

#106

[felixge]

Closed by #148.