horse: define rushed chance mod and current speed up ability types

Fixes #17.

skill.go

@@ -78,6 +78,9 @@ func (a Ability) String() string {
 		case AbilityHP:
 			r = append(r, (a.Value * 100).String()...)
 			r = append(r, '%')
+		case AbilityRushedChance:
+			r = append(r, a.Value.String()...)
+			r = append(r, '%')
 		case AbilityGateDelay:
 			// This skill type in particular should be × instead of +.
 			r = append(r[:len(r)-1], "×"...)
@@ -85,7 +88,7 @@ func (a Ability) String() string {
 		case AbilityFrenzy, AbilityAddGateDelay:
 			r = append(r, a.Value.String()...)
 			r = append(r, 's')
-		case AbilityCurrentSpeed, AbilityTargetSpeed, AbilityLaneSpeed:
+		case AbilityCurrentSpeed, AbilityCurrentSpeedUp, AbilityTargetSpeed, AbilityLaneSpeed:
 			r = append(r, a.Value.String()...)
 			r = append(r, " m/s"...)
 		case AbilityAccel:
@@ -160,8 +163,10 @@ const (
 	AbilityFrenzy         AbilityType = 13 // Frenzy
 	AbilityAddGateDelay   AbilityType = 14 // Added gate delay
 	AbilityCurrentSpeed   AbilityType = 21 // Current speed
+	AbilityCurrentSpeedUp AbilityType = 22 // Current speed
 	AbilityTargetSpeed    AbilityType = 27 // Target speed
 	AbilityLaneSpeed      AbilityType = 28 // Lane change speed
+	AbilityRushedChance   AbilityType = 29 // Rushed chance
 	AbilityAccel          AbilityType = 31 // Acceleration
 	AbilityLaneChange     AbilityType = 35 // Forced lane change
 )