- Constructor of Identifier from integer is now explicit
- Lobby hero/town selection now uses Identifiers instead of int's
- Removed serialization workaround for hero portraits
- Added dummy objects for custom heroes portraits for ID resolver to use
- HeroInstance now stores portrait ID only in case of custom portrait
- Fixed loading of campaign heroes portraits on RoE maps
- extracted low-level reader from MapFormatH3M class
- added separate structure to define version-specific values
- cleared up some H3M format edge cases
- replaced witch hut skill vector with set
- converted several fields to enum type
