CPU usage is misreported.

Currently "0 CPU" means "no CPU metric received in the previous ProfileEvents packet". But there can be many ProfileEvents packets and only a few with CPU increment.

That's why the CPU metric shows something weird like:
```
0
0
0
0
0
1234
0
0
0
...
```

This is unbearable, and the CPU metric should be either fixed or removed altogether.
if (options.count("config-file"))
        config().setString("config-file", options["config-file"].as<std::string>());
    if (options.count("queries-file"))
        queries_files = options["queries-file"].as<std::vector<std::string>>();
    if (options.count("multiline"))
        config().setBool("multiline", true);
    if (options.count("multiquery"))
        config().setBool("multiquery", true);
    if (options.count("ignore-error"))
        config().setBool("ignore-error", true);
    if (options.count("format"))
        config().setString("format", options["format"].as<std::string>());
    if (options.count("vertical"))
        config().setBool("vertical", true);
    if (options.count("stacktrace"))
        config().setBool("stacktrace", true);
    if (options.count("print-profile-events"))
        config().setBool("print-profile-events", true);
    if (options.count("profile-events-delay-ms"))
        config().setInt("profile-events-delay-ms", options["profile-events-delay-ms"].as<UInt64>());
    if (options.count("progress"))
        config().setBool("progress", true);
    if (options.count("echo"))
        config().setBool("echo", true);
    if (options.count("disable_suggestion"))
        config().setBool("disable_suggestion", true);
    if (options.count("suggestion_limit"))
        config().setInt("suggestion_limit", options["suggestion_limit"].as<int>());
    if (options.count("highlight"))
        config().setBool("highlight", options["highlight"].as<bool>());