BUG: jihai dorasoba
BUG: silica_risk_estimate: remove non-reach players
erased hoge.txt
silica.rb: debug output, silica_heuristics.rb: changed pai_point
silica_risk_estimate: refactoring
kuikae.rb: kuikae_checker
refactoring
changed shanten API. We must clearly specify the types (NORMAL, CHITOI, KOKUSHI)