Update hetchel.txt

"In the new Silk Pants questline, Hetchel says "...they are true heros..." and it should be heroes instead. I will also post to IRC to increase chances of this being seen." -Crazyk8e
Update ferry.txt

yes to Yes
no to No
Merge pull request #208 from 0x0Eddine/edits

Update hetchel.txt typo