Autocomplete on the command line

[micheleorselli]

I could be useful to get autocompletion for task names (and maybe options) on the command line. I did a quick research and there are few ways we can achieve that

https://github.com/stecman/symfony-console-completion
https://github.com/bamarni/symfony-console-autocomplete
https://github.com/robbyrussell/oh-my-zsh/blob/master/plugins/symfony2/symfony2.plugin.zsh
https://raw.githubusercontent.com/jaytaph/SFConsole/master/console_completion.sh

what do you guys think?