Added StorageSample from google sample code.
Added StorageSampleNGTest from google page: 
https://cloud.google.com/storage/docs/json_api/v1/json-api-java-samples
Added list, add object create bucket to StorageSampleNGTest from google page:
https://cloud.google.com/storage/docs/json_api/v1/json-api-java-samples
Added more gitignore cases.
Cleaned up, added comments.