Patch 0.8.7 - Day 6 new content

Day 6 is rather lacking still, being the same as day 5 but a little faster, so after some pondering I've come up with something neat and scary for day 6. This patch implements the first bits and bobs for this as well as offers some further polishing of the difficulty curve throughout the latter days and some minor bugfixes.

• Day 6: Lights are off, but a lantern spawns. Need to use lantern to light the way. This lantern will get a second function as soon as the new monster is implemented,
• Day 4 toy parts spawn rate has been increased to make that day more fair,
• Day 6 toy parts spawn rate has been decreased to make that day a little more challenging,
• Competitor can no longer kill you whilst the day ends,
• Fixed Boss voice still playing when he kills you,
• Fixed light flickers stopping when Boss decides to kill you,
• Made it more obvious that you can use the shovel against Competitors,
• Polished the loading screen.