Checking link sources in the Readme

[anjchang]

Thanks for uploading this. I've been playing with it and learning by reading the link sources.
Fixed inline links were swapped for horse_ebooks and zzt_ebooks.
FYI-- The Freli link is down . http://www.nkuitse.com/freli/
The Apollo flight journal link http://history.nasa.gov/ap11fj/ is broken, perhaps you meant https://history.nasa.gov/afj/ap11fj/index.html

[anjchang]

also would be helpful to add the import to the WordTokenizer example
from olipy.tokenizer import WordTokenizer