Easy mode and archer improvements

A new version is online:

• Increased speed of all arrow shooting attacks
• Archery damage upgrades are now doubled
• Since the fire speed is already increased, the Quiver upgrade doubles the arrow damage instead. You can duplicate it to stack even more damage.
• Reduced poison duration in all game modes
• Reduced burning duration for players
• Reduced freezing time for players
• You can no longer smelt the Tar of Akhal
• Updated some translations

Easy (casual / party mode) changes:

• Removed the death countdown
• Full heal at start of each level
• Fully heal one of the players when revived
• Redhead warriors in the desert have regular attacks instead of petrification
• Reduced all poison duration to 1 battle
• Reduced freezing duration for enemies in the ice level to remove the chance of getting freeze-locked