Major Update v0.2.0

This update adds the fully playable portal #4 with its additional systems and quests to guide discovery.

The main features of portal #4 are the vertical expansion of the world (with new biomes, enemies, npcs and items), and the customization of the seasons that can be ordered in the way the player wants (now there are 6 and each one with their efects).

For the next big update (v0.3.0) I plan to include horizontal expansion (already functionally, but locked), more focus on date-based events, and (hopefully) a progression tweak to change the numbered portals to start outlining the story.