New armored enemy variant update

Small update with some bug fixes and extras:

• Modified the Upgrade system so that upgrades and abilities are now unique when rewarded out. you should no longer see duplicates when leveling up.
• new "hairspray" icon. 
• added an ability bar to see which abilities have been chosen, and their cooldown.
• new 'all ability' upgrade, Damage Upgrade, which boosts damage for all abilities by 1. 
  
• a combat log that has a list of all damage entries inside.
• New "armored" enemies with it resistances and vulnerabilities. 

Enemies come in an armored variant now. What armor does is give pierce and normal resistances, while creating a vulnerability for 'fire' damage types. The imp type is naturally resistant to fire. 

The armored imp is especially tough, because the armor variant only reduces his fire damage to a normal amount.  

Health and damage has been adjusted to account for resistances and vulnerabilities, and they're not quite tuned perfectly, in fact, its probably too hard atm. 

A look into the future:

Since I've added the vulnerable/resistant feature my plan is to add more abilities, damage types, and enemy types that could be more resistant/vulnerable to others, and adding upgrades that could synergize with these types.

A problem I'm already experiencing is that a lot of this information isn't available in game. Damage numbers, resistances, vulnerabilities, and ability information are some of the information that I need to surface to the player. I'm hoping the previously mentioned tooltip system will alleviate all of my concerns here.

More balancing and scaling is something I'm also looking into. I'm relatively new to this kind of data and trying to scale.

For example, the experience per level and experience reward per kill is something that I'll be looking into. Also demon HP vs damage being dealt by the player.

Oh— also, the next update might be a bit further down the line than the previous two. I am going to be jamming in the pirate jam this Wednesday with some friends, so it might a few weeks before I return to this project again.

Thanks for reading!