Another small patch — Spirits of Xanadu Steam update #982400

This is just a small update to address some things I forgot in the previous one, and a few other things I felt like doing. -Updated to Unity 5.4 which was just released, its changelog indicates audio and GI improvements, as well as multi-threading performance improvements (I can't tell any difference). -Hard Mode no longer resets you to your last save point when you die. -You can now disable the key prompt display, in addition to the hint text, when hovering your cursor over something you can interact with. -If your "Interact" key is longer than one character it will display a hand icon instead of the key's name (e.g. when assigning the third mouse button to "Interact", the on screen text would previously display obtrusive "Mouse3" text). -Pressing the Escape key will cancel a key assignment in progress, and is no longer allowed to be changed from "Pause". -Fixed the first pillbot being ...