Add 'pkna' feature lookups

Actual glyphs will be added in near future.
Add proportional Kana glyphs
Merge branch 'kana' into pkna

Update Makefile
Update query in rotcid.py
Merge branch 'pkna'

Add 'pkna' feature and glyphs

Conflicts:
	HZMincho.sql
	pua-extension.txt