Time score calculation

(((top10%-pb) / (top10%-wr))     * 0.5   + 0.5   if in top 10%,
 ((top40%-pb) / (top40%-top10%)) * 0.45  + 0.05  if in top 40%,
 ((top70%-pb) / (top70%-top40%)) * 0.045 + 0.005 if in top 70%,
 ((top90%-pb) / (top90%-top70%)) * 0.005         if in top 90%,
 0                                               if placed lower)

wr - world record time
pb - your replay's time
top10% - ⌈0.1 * n⌉th position's time (aka the top 10%'s skill level)
top40% - ⌈0.4 * n⌉th position's time (aka the top 40%'s skill level)
top70% - ⌈0.7 * n⌉th position's time (aka the top 70%'s skill level)
top90% - ⌈0.9 * n⌉th position's time (aka the top 90%'s skill level)