Makes key repeat and initial delay rates configurable

Also increases the configured keyboard repeat rate value to 1

This is an aggressive repeat rate suitable for
professional programmers (and if you don't accept
this pull request we're taking over this repo!)

Signed-off-by: Jonathan Barnes <jonathan@codeword.net>
Merge pull request #115 from codeword/evenFasterKeyRepeatRate

Increases keyboard repeat rate value to 1