Move persistence stuff to own package

main.go

@@ -12,8 +12,8 @@ import (
 
 	"git.hamburg.ccc.de/ccchh/spaceapid/config"
 	"git.hamburg.ccc.de/ccchh/spaceapid/handlers"
+	"git.hamburg.ccc.de/ccchh/spaceapid/persistence"
 	"git.hamburg.ccc.de/ccchh/spaceapid/types"
-	"git.hamburg.ccc.de/ccchh/spaceapid/util"
 )
 
 var (
@@ -39,7 +39,7 @@ func main() {
 	conf := config.ParseConfiguration()
 
 	// Merge old state if present
-	util.MergeOldState(&conf.Response)
+	persistence.MergeOldState(&conf.Response)
 
 	// Register signal handler
 	sc := make(chan os.Signal, 1)
@@ -47,7 +47,7 @@ func main() {
 	go func(resp *types.SpaceAPIResponseV14) {
 		<-sc
 		log.Println("Saving state and shutting down...")
-		util.SaveCurrentState(*resp)
+		persistence.SaveCurrentState(*resp)
 		os.Exit(0)
 	}(&conf.Response)