Use ft/s for imperial speeds
authorKeith Packard <keithp@keithp.com>
Tue, 11 Sep 2012 22:53:36 +0000 (15:53 -0700)
committerKeith Packard <keithp@keithp.com>
Tue, 11 Sep 2012 22:53:36 +0000 (15:53 -0700)
Bob Brown thinks this unit will be more useful than mph

Signed-off-by: Keith Packard <keithp@keithp.com>

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