Changing files to have in progress status and not current
Merge pull request #375 from ENCODE-DCC/1618-fix-file-object

Changing files to have in progress status and not current
Make the aws file migration script also upgrade files.
Fix aws import script
Missing versions
Fix migrate script
Fix example script to work with new schema.
fix problem indexing long file_size.
Add NTR to treatment regex pattern
CORS Allow Range header. Also needs configuration of S3 buckets.
Tweak CORS headers.
Display references on software summary.
Merging in master.