Not duplicating spell docs if they're explicitly granted.
Gradually reducing the initial size of the highlight arrow as the player levels up.
Added a bunch of button click sound triggers.
Messed around with equip button and active item css.
Silhouetted items show what level they'd need to unlock after a while on hover from inventory modal.
Changed 'Your Skills' to 'Help' for hero level spell palette.
Requiring certain heroes for certain levels, and showing the choose hero view when they go to play a level where the hero has changed.
Merge branch 'master' into production