Upload files in 1MB chunks, resume available.
forked from: https://github.com/mailopl/html5-xhr2-chunked-file-upload-slice/ NO LICENSE
css from: https://github.com/blueimp/jQuery-File-Upload MIT LICENSE
Changed:
Parallel upload -> Serial upload
Added: Resume, MD5 checksum, IE11/IE10 support, CORS headers