kvs

kvs is a memory based key-value storage system.
kvs是一个基于内存的key-value存储系统。
kvs is similar to memcache,but easier to use.
kvs与memcahce的功能很相似，但是相对memcache来说更容易使用。
providing get,set,delete interface by http.
kvs提供基于http的接口， 用户可以通过浏览器直接get, set or delete.
eg:
set a key-value: foo=12345
http://127.0.0.1/set?key=foo&val=12345
To get the value of foo:
http://127.0.0.1/get?key=foo or http://127.0.0.1/foo
To delete the key-value:
http://127.0.0.1/del?key=foo or http://127.0.0.1/delete?key=foo