A very idiosyncratic time tracker. Almost certainly not useful to anyone who isn't me.
Started out as an elixir app (see the elixir branch), switched to ruby as elixir has no easy
equivalent to ruby's STDIN.getch (get a char in raw mode). Took the
opportunity to play around with https://github.com/ruby-concurrency/concurrent-ruby actors
bundle
chmod +x tt
./tt