docker: enable building selected version/tags

See merge request !21

README: formatting and nitpicks

See merge request !20

README: update with info for 20200914 version

See merge request !19

shotgun: improve default dir handling when $PWD var is not set

See merge request !18

shotgun: updates

See merge request !17

A slight improvement over the previous UI.

- now it's possible to select protocol and send 100% of traffic over it
  (udp, tcp, dot, doh)
- check dir exists to fail early (instead of after test)
- rename options related to binding to IP, these are likely to change in
  the future
- remove stats_interval, since it's better to always use 1s with updated
  dnsjit

Related #6

scale: tool to scale clients in pcap

See merge request !15

pellet: filter malformed queries

See merge request !14

tools/analyze_clients: plot query distribution among clients

See merge request !13

tools/plot_latency: fix displayed QPS

Closes #4

See merge request !12

Add missing conversion from millisecods to seconds in QPS calculation.

Fixes #4

tools/plot_time_series: improve axis limit detection

Closes #3

See merge request !11

docker: ensure apt is noninteractive

See merge request !10

update libuv

See merge request !9