Fixed credentials file error

• Support service account format
• Support credentials_file_path and secret_file_path configuration
• Add documentation How to generate access_token (using service account is recommended)

1.0.1

Update service account documentation

v1.0.0

Replace service account by oauth (credentials.json file)

v0.5.0

• Add fire complete and fail events
• support subfolders

v0.4.2

disable threading from upload process

v0.4.1

Fixed resource_exists method

v0.4.0

• update delete service: user Thread process
• Fixed issue: two folder with the same name

0.3.0

• Add threading for upload file process

v0.2.0

• Add gdrive_uploader.delete service

v0.1.2

• Fixed directory name duplicate issue
• Add debug logs