ZXKVStore 是一个简单易用的键值数据存储。
使用：
println(ZXKV["homepage"]) //nil ZXKV["homepage"] = "http://www.zhangxi.me" // store a value to the key println(ZXKV["homepage"]) //http://www.zhangxi.me let array = ["abc","123"] ZXKV["array"] = array println(ZXKV["array"]) //["abc","123"] //any object which implemented NSCoding can be stored.
