More bug fixes for pubmed harvesting

• check for at least one letter in first name when constructing queries
• fix error in notification manager

Bug fix for duplicate publications being returned in API

• fix issue with duplication publications being returned in publication API due to 'uniq' being deprecated in rails 5.1

More bug fixes for pubmed harvesting

Also limit the number of publications harvested for pubmed and add ability to disable easily

Bug fix for pubmed harvesting

• prevent harvesting of too many publications in pubmed queries
• cleanup task for bad harvest

Guard against blank publications during pubmed harvesting

See #1054

Bug fix for blank authorship on Pubmed harvested publications

See #1053

Pubmed Source Harvesting

• Pubmed harvesting
• fix issue with our content-type response being incorrect (text vs json)

Harvest authors who have any identities changed on nightly update

Also, Grape API removed and switched to rails

Rails 5

App now runs on Rails 5 and has all dependency updates applied

Remove all sciencewire code

v3.2.0

v3.2.0