chunked file uploads

Send 10MB at a time.  I needed to modify the js file upload library to send chunks first, then needed to make the JobsController read the Content-Range headers.  The JobRecord receiveFile method has been deprecated and split into three parts: new, append and finish.  The JobFile is only created once the upload is finished.
little cleanups
spelling errors in comments?? oh no!

will not do...
Removing param broke the tests :(

But now they are testing a deprecated method.
updated jobrecord test to chunked upload
Update JobTest to chunked upload
don't mess up the comments

(sorry)
Merge remote-tracking branch 'origin/master' into hr-fix-fileupload
Merge pull request #319 from nla/hr-fix-fileupload

Chunked File Uploads