Add Berry Powder, Pokéblock3, Decoration3, and Record4 editors

[abcboy101]

• Add Berry Powder field to Misc3 editor
  • Document Emerald Berry Powder offset
• Add Pokéblock Case editor for Gen3, based on the Poffin Case editor for Gen4
• Add Decoration inventory editor for Gen3, based on the Underground editor for Gen4
• Add Record editor for Gen4, based on the Record editor for Gen5
  • Document Gen4 Record data substructure
  • Most of the record fields are currently undocumented; the only one that I've consistently identified across all of them is the score displayed on the Trainer Card