[feature] Add close event demo.
[feature] change git ignore.
Make CloseEvent available to userland

now you can get close status and reason from close handler for debugging purpose.
[feature] Build new.
Delete auth.
Merge pull request #3 from wangxiao/master

1.0.3 release
Merge pull request #6 from leancloud/1.0.4

Merge 1.0.4