Update v0.0.2

Update with general tweaks and new content. There weren't any air light/heavy attacks previously, so some have been added.

• Walking speed and running speed have been increased, especially walk speed
• Added a card upgrade to make default katana slash usable in mid air
• Added a card upgrade to make katana slash upward usable in mid air
  • Good recovery tool
• Added a card upgrade to make katana slash downward usable in mid air
  • Can catch opponents by surprise with its downward momentum
• Added the air light attack Aerial Kick Up
• Added the air light attack Aerial Chop
• Added the air heavy attack Aerial Stomp
• Added the air heavy attack Aerial Slam
• Tweaked the animation for the default air heavy attack
• Tweaked the animation for the default heavy attack
• Hurtboxes for all attacks have been tweaked to extend before the attack actually comes out
  • This makes it easier to interrupt heavy/slower attacks with lights
• Music now muffles on pausing or when the shop opens