Get rid of savegame encryption

Saving games without encryption wouldn’t hurt anybody since, to my knowledge, there isn’t any savegame editor working with v1.13 anyway.

The benefit, however, would be enabling advanced users to hex their savegames easily. This would eliminate the need to fire up the full-blown debugger just in order to fix a little thingy causing a problem in the game or you’ve changed your mind about. Think for example of IMP creation. There is a tool which handles this but it has flaws, too. Or adjusting game options half-way through. Anything really.

Please do.