Neo-obs

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- Added API to neo-obs
- Added list bucket in storage function
- Added list object in storage function
- Added create bucket in storage function
- Added delete bucket in storage function
- Added bucket info in storage function
- Added delete object in storage function
- Added object info in storage function
- Added upload object in storage function
- Added download object in storage function
- Added copy object in storage function
- Added move object in storage function
- Added object usage in storage function
- Added bucket usage in storage function
- Added set object ACL in storage function
- Added set bucket ACL in storage function
- Added get object url in storage function
- Added make directory in storage function
- Added list gmt_policy in storage function
- Added create user in admin function
- Added delete user in admin function
- Added suspend & unsuspend user in admin function
- Added list user in admin function
- Added user info in admin function
- Added set qos user limit in admin function
- Added delete qos user limit in admin function
- Added qos user info in admin function
- Added create new credibility for user in admin function
- Added change status credibility for user in admin function
- Added delete credibility for user in admin function
- Added list credibility user in admin function

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- Add directory experience. Treat object ends with a backslash as a directory.
- Modify the use of `prefix`. Now we use `s3://bucket/a/b/` instead of `-p a/b/`
- Fix download error for the object that contains forward-slash (26)
- Add a choice of using HTTPS or HTTP to access buckets

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Initial release.