Update README.md

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.
Merge branch 'haskell' of github.com:newsomc/papers-we-love into haskell