More flexible player controls

I'm working on Down in Brazil, and I thought, "Gee, it would be nice if I could click and drag on a section and it would loop." And it was so... unexpected. but very useful.

I think the transport controls could be improved/extended. I often want to start from the beginning when I mess up. I'm used to hitting the return key to do that. And go back a bar with the left arrow key, etc. These kind of simple keypad driven controls would be very useful, and also let the user binds keys as desired.