Controller support, physics made less wonky, enemy edited, etc

Just wanted to keep everybody up to date on the latest patch to the game. No new content in the demo, but a ton of tweaks that have made their way into the main game and will make experiencing the new content a much more polished experience 

- added a very generous "coyote time" to platforming to give a little more leeway around edges

- made the torch smoothly interpolate between left and right positions rather than snap into position 

- made some significant changes to the visual effects surrounding the assimilator

- added controller support for all builds