Merge pull request #93 from siren186/master

+ 补注册表操作接口,及单元测试
Merge pull request #94 from siren186/master

+ 完善读写注册表二进制操作接口,及单元测试
Merge pull request #95 from siren186/master

* 补充注册表MultiSz接口,加一个转双'\0'字符串到数组的函数
Merge pull request #96 from siren186/master

+ 添加MD5算法
Merge pull request #97 from siren186/master

* 重命名: md5.h -> md5.hpp
+ import libevent
* ignore nvb
Merge branch 'master' of https://github.com/zpublic/zpublic
Merge pull request #98 from siren186/master

+ 添加CRC32算法(摘至zlib-1.2.8, 有删改)
* memory 加入获取内存使用大小
+ add libevent timer tester
Merge pull request #99 from siren186/master

* 修改2处因curl版本太低,而造成的编译不过问题.
* 处理z_com一个命名冲突
Merge branch 'master' of https://github.com/zpublic/zpublic
Merge pull request #100 from siren186/master

* 加必要的注释说明
Merge pull request #101 from siren186/master

* 重构数字签名接口.
Merge pull request #102 from siren186/master

* 修改数字签名接口
Merge pull request #103 from siren186/master

+ 新增字符串切割函数
* update zpublic_release
Merge pull request #104 from siren186/master

- 去掉没用到的局部变量