Fkl CLI

test by api:

$ fkl --help
Feakin is a architecture design and visual collaboration tool. This is the parser for Feakin.

Usage: fkl <COMMAND>

Commands:
  dot   generate Graphviz/Dot from fkl file
  ast   generate ast from fkl file
  gen   generate code from fkl file
  run   run function from fkl file
  help  Print this message or the help of the given subcommand(s)

Options:
  -h, --help     Print help information
  -V, --version  Print version information