Add Haskell free courses by Prof. Graham Hutton (#8123)

* Add Haskell free courses by Prof. Graham Hutton

* Alphabetical sort order for Haskell resources

* Fix lint errors for Haskell resources

* Add only one link per course; Remove honorific title from author name;

courses/free-courses-en.md

@@ -566,10 +566,12 @@
 
 ### Haskell
 
+* [Advanced Functional Programming in Haskell](http://www.cs.nott.ac.uk/~pszgmh/afp.html) - Graham Hutton
 * [C9 : Functional Programming Fundamentals](http://channel9.msdn.com/Series/C9-Lectures-Erik-Meijer-Functional-Programming-Fundamentals) - Erik Meijer
 * [CIS 194: Introduction to Haskell](http://www.seas.upenn.edu/~cis194/) - Brent Yorgey
 * [CS240h: Functional Systems in Haskell](http://www.scs.stanford.edu/11au-cs240h/notes/) - Bryan O'Sullivan
 * [edX: Introduction to Functional Programming](https://www.edx.org/course/introduction-functional-programming-delftx-fp101x-0) - Erik Meijer
+* [Functional Programming in Haskell](http://www.cs.nott.ac.uk/~pszgmh/pgp.html) - Graham Hutton
 * [RWTH Aachen University: Functional Programming](https://videoag.fsmpi.rwth-aachen.de/?course=12ss-funkprog) - Jürgen Giesl