Sounds nice, but you picked a very unfortunate name, as Twig is already a quite well known templating engine in the PHP world (http://twig.sensiolabs.org/).
Still, very cool for those of us branch-addicts who make a new one for every single new feature!
Besides the name making it difficult to come back to (google shows an older twig thread on HN) ... I come across various nice projects like this one, and "tig" and also "eg" (easy git). However, its tough to find a compelling reason to use most of these add on tools over some home-backed script or just the command line.