Use per mille text naming instead of unicode code.
Description graphics updated.
Merge pull request #1 from ming13/permille-naming

Use per mille text naming instead of unicode code
Add inverted exclamation mark.

It’s similar to to the inverted question mark placed on the “7” button.
Merge pull request #2 from ming13/inverted-exclamation-mark

Add inverted exclamation mark