Include the keyboard by default.
Add a startup script enable HDMI output on the DE4.
Add a -i flag to be used when run directly by init.  It cases a second
command line option (tty name) to be ignored.
Add a timeout (in milliseconds) argument to ts_poll().
Update copyright dates and attributions.
Suppress a warning about casing away a qualifier.
Add support for advancing slides using left and right arrow keys.

This permits the use of a a Kensington wireless USB clicker (it appears
as a keyboard).