v0.3.2

Major changes

• Add Paper#category alias for Paper#primary_category. (#34)
• Change Author#affiliations? to Author#affiliated?. (#34)
• Change Paper#last_updated to Paper#updated_at (and remove updated_at alias). (#34)
• Change Paper#publish_date to Paper#published_at (and remove published_at alias). (#34)
• Conditionally assign query object in Arx.search with ||= operator. (#33)
• Add gem:debug rake task for loading the gem into an interactive console. (#28)
• Add gem:release rake task for preparing gem releases. (#36)
• Add thor gem development dependency. (#36)

Minor changes

• Update documentation links to rubydoc.info's GitHub service. (#30)
• Add email address to LICENSE. (#31)
• Improve Error::MissingField and Error::MissingLink error messages. (#35)