Merge remote-tracking branch 'origin/master' into 1786-library-spikeins-ui
First pass at assay dataset display

Existing code only displays the first assay. Will next try displaying all of them.
Back out library test data change.
Merge remote-tracking branch 'origin/1786-library-spikeins' into 1786-library-spikeins-ui
make subobject with url, methods summary, file format, data type
First pass publication supplemental data array
Implement supplemental_data subobject in UI
Merge remote-tracking branch 'origin/master' into 1786-library-spikeins-ui
Back out publication.json test data
Merge remote-tracking branch 'origin/master' into 1781-data-subobject
Merge remote-tracking branch 'origin/master' into 1786-library-spikeins-ui
Merge pull request #452 from ENCODE-DCC/1786-library-spikeins-ui

1786 UI for assay spikeins display
Update regex in organism name to allow for numbers
Add T7 control to target upgrade
Make validation error name consistently be a path list.
Remove old edw_key code (still using edw_hash though.)
Removed extra comma and trailing blank line
Return 401 Unauthorized whenever an incorrect authorization header is sent.
Add proposed as status default to target
work around chrome regression (https://code.google.com/p/chromium/issues/detail?id=413795) that broke dragging blocks