indexing and shell-like resources

[carlosecb]

Basicly, wouldn't you implement a shell-like way to change the current directory? So that you could restrain the recursive indexing to just a few layers or so. Also, so that it wouldnt be needed to exit the app to change directory. Just to be easier to go to sub-directories and back (only "as high" as the directory you were when launching amp). Thanks you all devs, I've really loved the concept of this project and hope the best to it.