Fixed missing Japanese characters in the OSK.  Fixes issue 2386 and issue 2468

ie see Issue #2386 and #2468 
Also added the vowel lengthening character to Katakana and Hirigana

Before:
![](https://f.cloud.github.com/assets/4050814/686705/5c2dd430-da62-11e2-87e4-083c7e1ab154.png)

After:
![](https://f.cloud.github.com/assets/712067/705737/0581b0c0-dddc-11e2-838f-d609f8b031b9.png)


Ended up being garbled because they were the incorrect encoding in the file.