New chart and lots of stuff for piggy banks

app/models/TransactionJournal.php

@@ -138,6 +138,14 @@ class TransactionJournal extends Ardent
         return $query->where('date', '>=', $date->format('Y-m-d'));
     }
 
+    /**
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function piggybankevents()
+    {
+        return $this->hasMany('PiggybankEvent');
+    }
+
     /**
      * @param                $query
      * @param Carbon         $date