v1.0.0

1. support @var in URL like berf :9335/pingoo/@ksuid -u imgs -d60s -v, 2021-12-29
2. support httpie like args berf :10014/query q="show databases" -n1, 2021-12-23
3. berf :5003/api/demo -n20 -pA to print all details instead of realtime statistics on terminal, 2021-12-22.
4. Add a TPS-0 comparing series to the TPS plots, 2021-12-02.
5. Support Cocurrent-Duration-TPS-Latency output and web charts