fixed error response

Merge pull request #46 from LyricTian/develop

fixed error response

fixed error handling

Merge pull request #45 from LyricTian/develop

update release version

add bearer token validation

Merge pull request #43 from LyricTian/develop

validation bearer token add error return

add refreshing token config

Merge pull request #40 from LyricTian/develop

add refreshing token config

Use golang.org/x/oauth2 in client import

Merge pull request #38 from LyricTian/develop

update travis

fixed authorization request

Merge pull request #36 from LyricTian/develop

fixed authorization request

update the implementation details

Merge pull request #32 from LyricTian/develop

update the implementation details

repair the details

Merge pull request #31 from LyricTian/develop

modify readme

optimization of error handling

• support custom error code
• change the open source licenses for MIT

remove glide

Merge pull request #28 from LyricTian/develop

update README