v0.6.3
Added support for adding metadata with indexes in the `ia upload` command. i.e.: ia upload <id> -m "subject[0]:first subject" -m "subject[1]:second subject"
Changed access/secret key env variables
Fixed list flattener, removed print statement
Patch tuple/dict handling in Item.upload
Warn about pending deprecation of AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY env variables (Use IAS3_ACCESS_KEY, and IAS3_SECRET_KEY).
Ignore CSV files.
Added helpful exception message for 400 bad request responses from IAS3.
Merge remote-tracking branch 'upstream/master'