SCP early access patch 2

New update up for testers and those with early access. I added a throwback everfree section that is still in it's early stages. As for fixes, the cave spawn shouldn't be giving you issues anymore and all hub interactions people pointed out for me have been corrected. I also added a 24 frame grace jump window for when you accidentally stepped off a platform, a small prejump window and a new voice clip for Trixie getting hurt among a few other QoL changes. 

OS_X version will follow in a day.