Fixing minor bug that prevent logger to work and retrying functions.
0.1.0
The structure the code has been updated significantly with logger instead of simple print statement. Many core functions has been updated with retry option and buffering time between retry.
There is also a new Mailer class which can be used to easily send out email.
0.0.5
0.0.4
Make storage_path compulsory in OdpsConnector, and fix issues with extract_header method on all classes