4.0.0.beta1

• added support for heic/heif + webp
• rearranged maven module structure to be more flexible
  • separated between storage + entity
  • added imgproxy pre configuration
  • breaking changes
• corrected jpa entity naming
  • asset_keyvalue_pairs -> asset_keyvalue_pair
• refactored AssetPreviewHandler to handle multiple asset jobs
  • prepared for planned ImageMagick command support
• many more...