Demo Fixes

Just a quick little patch for some of the more big-but-easily-fixable issues in the demo version, here's the patch notes:

• Fixed an issue that was making certain enemies invincible while Enemy AI was set to Cunning
• Fixed a bug with the campfire shortcut door in the Starry Peaks
• Fixed an encounter that was automatically increasing difficulty settings when fought
• (Mostly) fixed shopkeeper portraits, which weren't showing up at all
• Toned down the gruesomeness of a certain tree-related gag in Flowergrove
• Made the sign that marks the end of the demo actually readable (the text on it is nothing noteworthy)
• Rearranged some fanmail that mentioned skills too early to be relevant, and rewrote some of them to be more clear and helpful.
• Edited the description text for many skills to be hopefully a bit less confusing
• Fixed some bugginess with the breakable floors in the Dark Bad Castle
• Other minor fixes and tweaks that most people probably wouldn't notice, but I sure did

Other noted bugs. They're not gamebreaking, but they're annoying to fix. I'll get 'em eventually:

• Shopkeeper portraits and flavor text messages will sometimes disappear, but at least they kinda work for now
• Freeze and Petrify often don't properly reset character sprites when they're cured outside of battle
• MP isn't recovering when it should be according the the Free Heals setting
• Some enemies ignore usage conditions for specific skills in specific situations because of an error in an AI plugin