Tier changes and stuff

- I added a free tier to just get the normal development updates and removed the 2$ tier.
- I gave the paid tiers more early access period. Tier 5$ from 2->3 days, 10$ from 4->6 days, 20$ from 6->9 days, and a new 30$ tier -> 12 days. This is to make the rewards more meaningful.
- The other benefits stay mostly the same, it's just that you need the supporter tier for discord rewards now that the 2$ tier is gone, the special channel was moved to the new VIP tier along with a super HD version, and the old VIP tier became VIP+ which has the custom render requests.
- I haven't started with 2.1 yet and I'm planning where to take the game so I'm just chilling this week after making the release and 4 updates in 2 months. Expect a longer release schedule cause I can't handle this one now that there's one more character to pose and a story that I need to keep coherent, and I don't want to rush the game and burn myself out. It'll update every 3 or 4 weeks instead of 2. As always, thanks for your support!