Ransomware Payload has too many responsibilities. Break it out into focused components and use dependency injection to control the behavior of the ransomware payload.

• Transform BitFlipEncryptor into InPlaceEncryptor and inject it into RansomwarePayload's constructor (0d)
  • Fix unit tests
• Put README logic into ReadmeHandler and inject it into RansomwarePayload's constructor (0d) @mssalvatore
  • Fix unit tests
• Put inject select_production_safe_target_filesr() into RansomwarePayload's constructor (0d) @mssalvatore
  • Fix unit tests