Shafreeck

Add etcd v3 support

3

Etcd v3 has been released for some days, and we should catch up and support the latest api

The documents is too simple now. There are some more details we need - More about multiple watchers - Add guides about how to use the C api - Add...

`etcdctl` is hard to use and misses a interactive interface. Maybe cetcd should build a `cetcdctl` as an alternative of `etcdctl`

Hi I wrote a atom plugin [slides-preview](https://atom.io/packages/slides-preview) to preview remarkjs slides when writing markdown. But the slide can not scale well when toggle fullscreen. I think this may caused by...

Support to add limitation for specific namepsace

1

Limitations * QPS * Circuit broker

Review the added metrics

1

https://github.com/distributedio/titan/pull/204

Review the feature of reducing the seek range of expiration

4

Review #204

Review the feature of hashing expiration keys

1

Review #204

Review the handling of server connections

1

Review #204

Review the implementation of limiting QPS by namespace

1

Review #204