Also make it possible to pass a buffer to play_buffer

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Make test_info parameter optional in test_module

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Add curses player example

Start a curses-based player mimicking old DOS players with ASCII volume
bars.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Move example description README to examples directory

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>