1.0 release!

* added a new playable character, the samurai
* added three new maps, with new monsters, objectives, and bosses
* added 20 new spells
* added 16 new achievements
* added persistent character upgrades
* random spell unlocks are now awarded based on play time
* fixed the Fish boss logic not working correctly
* fixed bug where the ui could remain on screen when a chest is collected at the same time as levelling up
* fixed bug where chest hud tracker would remain on screen if chest was collected while hud was turned off
* fixed bug where chonky ice man could be pushed back by the flame ward attack
* fixed bug where alt-tabbing during startup could lock the game on a black screen
* fixed minor bug when a map portal was unlocked while in the lobby level
* fixed minor bug where clicking an unlock item in the ui stopped ESC from closing that screen
* minor performance optimizations