v1.1 - Battles more balanced

Hi all !!! I got a lot of feedback about how battles were way too hard and unbalanced and that battles were a bit boring, too. I overhauled a lot of that stuff and spent some time checking that things were the correct difficulty. More feedback is always welcome! Thanks everyone for your patience :-)

Release notes:

- Added new items to restore health. Most health restorative items do more restoring, too.
- Added XP to the game. Now you can level up from fighting monsters so grinding through is more worth it.
- Added new skills to the game that are learned as you level up so fights aren't so boring. You gain "rage" as you fight and can spend it on vicious attacks.
- Removed a couple of encounters to make it easier.
- Nerfed all enemies so they do half as much damage.
- Improved enemy behavior so they walk around before chasing you when you get close.