Fix #64, parsing a todo with europe date format

* the `hasDue` function was not running, and therefore it was not parsing the due date.
* Also added the beginnings of a more holistic test approach, using `app_test.go`.

1 files changed, 2 insertions, 2 deletions

diff --git a/todolist/store.go b/todolist/store.go
index 518a30e..b246d8b 100644
--- a/todolist/store.go
+++ b/todolist/store.go
@@ -2,6 +2,6 @@ package todolist
 
 type Store interface {
 	Initialize()
-	Load()
-	Save()
+	Load() ([]*Todo, error)
+	Save(todos []*Todo)
 }