Waiting on #212 or #220 ?

For what it's worth, I plan on using the profit callback in my new industry set, once these issues are resolved. So it's not just fixing something nobody uses. 😃

blocked by #173

#173 merged 23rd May

Additions since March 3rd:

Changes

• add constants GROUNDSPRITE_GRASS, GROUNDSPRITE_DESERT_2_2, GROUNDSPRITE_GRASS_1_3, GROUNDSPRITE_GRASS_2_3, GROUNDSPRITE_GRASS_3_3
• add builtin functions for round() and sqrt()
• warn when a deprecated constant is used
• progress display shows input filename when reading files
• improve error message when invalid features are used
• add plural form 14 for Romanian
• do not check plural forms of translations
• no longer accept iso-codes as grflangid (removes undocumented feature)
• add industry variable for 'town_index' (var 0x41)

Fixes

• town_euclidean_dist was returning incorrect value
• rename MAP_TYPE_RECTANGULAR to MAP_TYPE_SQUARE
• LZ77 fixes for compatibility with Python 3.9+
• access to persistent-storage of towns was broken
• use most likely defined position when reporting error

LZ77 fixes can be merged as 3.9+ I think

LZ77 fixes can be merged as 3.9+ I think

Done

This PR replaced by #232