Starting to add append to dataset for api.
Updated visualizations to show Bar and Histogram when data set consists of only one row of data
Hid the file and name table headers when there are no assocaited  media files.
Merge pull request #1416 from umin18/yc1391

Updated visualizations to show Bar and Histogram when data set consists ...
Merge pull request #1419 from umin18/yc1415

Yc1415
Minor fix for file name on media pull request.
Commenting out Jake's contribution key feature.
Removed stray -
added migration back in
Merge pull request #1420 from jaypoulz/kcTemp

Minor fix for file name on media pull request.
Merge pull request #1421 from jaypoulz/kcTemp2

Commenting out Jake's contribution key feature for release.
Selector now takes into account group filtering again.
Merge pull request #1424 from jaypoulz/fire

Selector now takes into account group filtering again.
Adding append to data sets through the api, contribution keys and email/pass accepted
Removed Name Units and Type from the Fields table header when there are no items in the set
Merge pull request #1429 from umin18/yc1426

Issue #1426
Making rubocop happy.
Addresses issue #1417
Addresses issue #1427. Changed padding to prevent overflow of read more link
Merge pull request #1430 from jdalphon/appendToDataSet

Append to data set