New event to create budget limits, new handler to handle said event, new routes for budget control, new routes for limit control, extended migration, extended models, extended JS. [skip-ci]

app/lib/Firefly/Storage/Budget/BudgetRepositoryInterface.php

@@ -6,6 +6,9 @@ namespace Firefly\Storage\Budget;
 interface BudgetRepositoryInterface
 {
     public function getAsSelectList();
+    public function get();
+
+    public function create($data);
 
     public function find($id);