Content Update (V0.8)

- Added the Gambler shop upgrade, which lets you bet on the success of your next run.
- Added the Cursed Dragonfire shop upgrade.
- Added the Dark Ritual Tome relic, which grants an opportunity to fight a new superboss.
- Added new particle FX to various attacks.
- Added 4 new achievements.
- Various other small tweaks/bug fixes.