libraries for enabling and disabling keyboard auto-repeat. Restored
auto-repeating in our own KeyboardManager, and disabled the interval used
to differentiate between a "real" and "fake" key repeat since we believe
we can now do without it.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2107 542714f4-19e9-0310-aa3c-eee0fc999fb1
Walter Korman