Update README.md
Removing lines at end of file.
Adds a practical paper by Simon Peyton Jones on tacklin monadic I/O, concurrency and foreign-language calls in Haskell. Published in 2010 by Microsoft Research. This is a very readable and useful paper for anyone learning Haskell and intersted in using it beyond academia.
Adding pdf as well.
Update README.md
Remove space from link title.
