Fix Typos

Module for Feram which fixes typos in all human-readable files.

Testing

To change filtering of logs by loglevel during testing simply overwrite command line flags:

npm test -- --level 0 --output inspect

Noteworthy Real Life Typos

• "referer" instead of "referrer" https://en.wikipedia.org/wiki/HTTP_referer
• "fullfill" instead of "fulfill" DmitryBaranovskiy/raphael#1047