add nginx module support

binding/nginx/README.md

@@ -0,0 +1,3 @@
+# 说明 
+
+- 编译本模块时，请手动链接对../c/ip2region.c文件的依赖。

binding/nginx/ngx_ip2region.h

@@ -5,7 +5,7 @@
 extern "C" {
 #endif
 
-#include "../../binding/c/ip2region.h"
+#include "../c/ip2region.h"
 
 typedef struct ngx_ip2region_conf_s {
     ngx_str_t   db_file;

binding/ngx-ip2region/README.md

@@ -1,4 +0,0 @@
-#说明 
-
-- 本模块依赖[ip2region](https://github.com/lionsoul2014/ip2region/tree/master/binding/c)项目,需要手动下载ip2region.c 和 ip2region.h文件后进行编译
-