Change get -> keys in an example

One of the examples in the readme used the path `/v1/get/foo` instead of `/v1/keys/foo`.
Merge pull request #39 from iconara/patch-1

Change get -> keys in an example
License project under the Apache License Version 2.0
Merge pull request #40 from traviscross/master

License project under the Apache License Version 2.0
Merge pull request #38 from xiangli-cmu/master

More tests
Merge https://github.com/coreos/etcd
Merge https://github.com/xiangli-cmu/etcd
fix typo