Add models for game, cache and settings.

models/cache.go

@@ -0,0 +1,11 @@
+package models
+
+import "time"
+
+type PlayerCache struct {
+	CacheID   uint      `json:"cache_id" gorm:"primary_key"`
+	PlayerID  uint      `json:"player_id"`
+	CacheDate time.Time `json:"date"`
+	Score     float32   `json:"score" gorm:"default:-1.0"`
+	Game      string    `json:"game"`
+}