0.4 Updates on tabular view

What's Changed

• Add new records in existing documents to avoid filling up their bibliographic data
• Add "remove item" to hide invalid records
• Explicit validation of records #81
• Add error-type in interface
• Restyle the edit dialog interface
• Add page to track all the operations on records
• Add page to view the log of the automatic extraction
• Various bug fixes

Full Changelog: v0.3...v0.4