Multi actions, save games and control customization in the brand new patch.

Hey all, I've just set the latest patch of the demo live. This one addresses some bugs and some user feedback from the past few weeks.

Latest changes:

• You can queue up research now by pressing Shift + the stuff you want to research.
• You can also add more of the same type of furniture, by holding shift when you click to place it.
• And, hold my beer, you can even keep adding more of the same type of food by holding shift when clicking to place it.
• Space bar now toggles between play and pause.
• You can now customize more of the controls. Don't like rotating with the right mouse button? That's fine, you can rotate with any other button! Just change it in the settings. Space bar to play / pause? Why not try F8?
• Saving games should now work a lot better. By that I mean, it should work now, it was definitely broken in a large number of ways before. Loading old save games will almost certainly be broken. There may be other exotic ways it is broken too, but at least those are a novel experience.
• Scrolling with a mouse wheel should work more correctly in more places.

Plus a bunch of smaller bug fixes.
Big thanks to everyone helping me find bugs and providing feedback, you're awesome!