heres what was fixed / changed / added

• fixed the player having over 100k coins
• added a new unit; the medic, heals allys in a small radius, costs 90 to make
• made the map 3x bigger
• reworked the necromancer, now he spawns 3 skeletons every 3 seconds, and now is slower
• disabled the castle upgrade (it was useless)
• added some optimizations to the sprites
• changed the music to be more tolorable