Extension to provide a custom project list for autocompletion

[javiercuadrado]

It would ve nice to have a way of providing custom list of projects on autocompletion. I'm using fish, so I modified "__fish_complete_bartib_projects" function on bartib.fish file to return my own project lists (instead of bartib internal one).

Maybe a new environment variable could be set to specify a command to be run to obtain a list of current projects.