fixed server error handling

Merge pull request #25 from LyricTian/develop

fixed server error handling

modify client model

Merge pull request #24 from LyricTian/develop

modify client model

Fixed error handling

• fixed error handling
• update comments

To optimize the implementation details

• to optimize the implementation details
• add glide support

To optimize the implementation details

• Add check the interface implementation
• Extract the default value

The realization of the optimization of details

• Support custom extension field
• Support custom scope
• Support custom expiration time of the access token
• Fixed some error handling

Token storage optimization

• Use buntdb provide token storage

Add travis

Merge pull request #13 from LyricTian/develop

Add travis

Refactoring implementation

• To optimize the error handler
• Add token memory store
• The separation of token redis store
• Fixed manage bugs

To optimize the implementation

Merge pull request #10 from LyricTian/develop

To optimize the implementation