Update 0.8.15

This is a small update fixing and improving a few issues.

• One new NPC in the school map: a girl running in the sports field. After completing the field track ten times, she will buy a drink and go towards map exit point.
  
• Two new uwabaki shoes (in the clothes store).
  
• New guardian statues of stone squirrels in the Shinto shrine map.
  
• Improved textures and UV maps for all tights and socks (better shadows and seams).
  
• New snacks: yakisoba pan (Taiyaki shop and Summer Town takoyaki stall), choco nuts ice cream, azuki ice-cream (vending machines).
  
• Schoolgirl NPCs now can actually buy and consume drinks and snacks in shops.
  
• In the Shinto shrine map, when all NPCs return to the bus, it will depart and ride away.
  
• Fixed a bug with tomato kissing simulation not starting in some cases.
  
• Rotation speed during walking is slightly increased.
  
• Fixed a water gun aiming issue (when used in "tank controls" mode).