[1.4] - 2017-10-05

Added

• CHANGELOG.md file
• All DiffUtil calculations are
  currently processed in a background worker thread, while preserving adapter state consistency.

Fixed

• DiffUtil implementation.
• #2, merge error when executing task: ':app:processDebugManifest'.
• #3, missing CHANGELOG.md file.
• #4, DiffUtil background work implementation missing.