Update README and .gitignore

Author: d-li14

.gitignore

@@ -114,6 +114,7 @@ ssd300_120000/
 demos/live
 webdemo.py
 test_data_aug.py
+checkpoints/
 
 # attributes
 
@@ -125,4 +126,4 @@ data/datasets/
 data/ssd_dataloader.py
 
 # pylint
-.pylintrc
+.pylintrc

README.md

@@ -45,7 +45,7 @@ Microsoft COCO: Common Objects in Context
 ##### Download COCO 2014
 ```Shell
 # specify a directory for dataset to be downloaded into, else default is ~/data/
-sh data/scripts/COCO2014.sh
+sh data/scripts/COCO2014.sh # <directory>
 ```
 
 ### VOC Dataset