change log: remove notebook checkpoint folder from repo tracking

Author: Wasin Waeosri

.gitignore

@@ -9,4 +9,6 @@ interday_result.txt
 interday_result2.txt
 interday_result3.txt
 interday_result4.txt
-notebook/test/
+notebook/test/
+notebook/.ipynb_checkpoints
+*/.ipynb_checkpoints/*