0.9.0: Obligatory Patch Number 1 (tm) — After the Collapse Steam update #127165

Hi there, Here's the first (and obligatory) patch for the 0.9 update. It's fixing the most urgent problems with the 0.9.0 build. As usual with this kind of patch, you don't need to start a new game, save-games and mods are compatible under the same limitations as with 0.9.0 proper. I fixed 2 typos which caused nasty side effects. One in code prevented survivors from efficiently dealing with stuff left on the ground (bug introduced in 0.9), making bases not taking full advantage of storage containers a lot less efficient. Another typo in a data file caused an exponential growth of zombies on the world map. Basically infected buildings would spawn new hordes every 2 hours instead of every 2 days, completely overrunning the world map in a matter of weeks. As much it could be a thing in a specific scenario, this wasn't intended to work like that in the main game. There are a few more fixes i...