Initial port of "explotion" code from Paragon.
reduce number of textures to 32, resize down to 256x256 from 1024x1024
Reduce the number of frames for the explosion.
Correct the loading index and clamped range.
Merge pull request #2831 from fluffyfreak/explosions

Explosions
Update Changelog.txt
auto-commit: translation updates
auto-commit: translation updates
[Return to game] button in game options menu
Merge remote-tracking branch 'radius75/return_button_in_game_options_menu'
auto-commit: translation updates
mingw doesn't have std::to_string, sigh
shipmarket: more specific message if equipment/slot not supported on the current ship model