update gitignore

eda/ml_tools/rate.csv

@@ -9,3 +9,4 @@ date,answer_imp_all,answer_imp_ios,answer_imp_android,diary_imp_all,diary_imp_io
 20180824,0.0145,0.0249,0.0092,0.7507,0.8864,0.6816,0.0457,0.0673,0.0285,56.84,92.03,0.0145,0.0147,0.0141,0.1228,0.1477,0.0943,0.1382,0.1624,0.1106,0.0352,0.0371,0.0342,0.0554,0.0718,0.0422
 20180825,0.0145,0.0272,0.0086,0.7412,0.8786,0.6785,0.0458,0.0707,0.0282,58.76,67.86,0.017,0.016,0.0194,0.1216,0.1483,0.0935,0.1374,0.1627,0.1108,0.0345,0.0363,0.0338,0.0491,0.0682,0.0354
 20180826,0.0141,0.0251,0.0084,0.7492,0.8875,0.6772,0.0488,0.0698,0.0296,52.71,72.48,0.016,0.0142,0.0212,0.1214,0.1459,0.0922,0.1386,0.1625,0.1101,0.0342,0.0362,0.0331,0.0736,0.1039,0.0484
+20180827,0.0152,0.0267,0.0096,0.7346,0.8691,0.6696,0.0472,0.0682,0.0293,53.8,85.28,0.0129,0.0134,0.0117,0.1214,0.1493,0.0921,0.1398,0.1684,0.1098,0.0396,0.0463,0.0364,0.0705,0.11,0.043