Implement basic node.js binding (not published on npm yet)

src/nfs/nfs_kv.cpp

@@ -303,7 +303,7 @@ void kv_fs_state_t::init(nfs_proxy_t *proxy, json11::Json cfg)
     // Open DB and wait
     int open_res = 0;
     bool open_done = false;
-    proxy->db = new kv_dbw_t(proxy->cli);
+    proxy->db = new vitastorkv_dbw_t(proxy->cli);
     std::map<std::string, std::string> kv_cfg;
     for (auto & kv: cfg.object_items())
     {

src/nfs/nfs_proxy.h

@@ -51,7 +51,7 @@ public:
     epoll_manager_t *epmgr = NULL;
     cluster_client_t *cli = NULL;
     cli_tool_t *cmd = NULL;
-    kv_dbw_t *db = NULL;
+    vitastorkv_dbw_t *db = NULL;
     kv_fs_state_t *kvfs = NULL;
     block_fs_state_t *blockfs = NULL;