Change rune type to uppercase, without Q,V,X

Because rune doesn't have Q,V,X, if the type is Q / V/ X, we set the
type as P forcefully.

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Fix typo in README

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Update usage in README

Signed-off-by: SeongJae Park <sj38.park@gmail.com>