Make sample data md5sums unique
Make file md5sum an alias, ensuring uniqueness.
Update keys for file.
Merge remote-tracking branch 'origin/master' into 1693-md5sum-constraint
Merge pull request #376 from ENCODE-DCC/1693-md5sum-constraint

1693 md5sum constraint
Merging in master.
Update software summary and search pages.
Update toolbar for post 2014-05-07 meeting.
Remove pub link in SW summary; Add Publication title to SW search page PMID/PMCID.
Update publication Jest test for changes to publications.