Heads up: porting CGEN to guile 2.x

[Jose E. Marchesi]

    > I woulc like to push and keep my wip in a public branch jemarch/guile2
    > in the git repo.  That will help in case someone else wants to help with
    > this.
    
    That'd be great.  I added you to the 'cgen' group so you can create
    this git branch.
    
Thanks!