improvements

src/DirectoryNode.cpp

@@ -64,7 +64,8 @@ void DirectoryNode::buildDirectoryTree(const char *currentPath)
         {
             break;
         }
-        if (entry.isDirectory())
+
+        if (entry.isDirectory() && strcmp(entry.name(),sys_dir.c_str()))
         {
             DirectoryNode *newNode = new DirectoryNode(entry.name());
             subdirectories.push_back(newNode);