Create Stack configuration and README.md with setup instructions

Includes workaround to stack.yaml config to auto install alex/happy:
commercialhaskell/stack#595 (comment)

Uses lts-5.11 (GHC 7.10) for El Capitan compatibility:
commercialhaskell/stack#563

.gitignore

@@ -79,3 +79,5 @@ sudoku5
 threadperf1
 threadperf2
 timeout
+
+/.stack-work/

README.md

@@ -0,0 +1,145 @@
+# SeaHUG "Parallel and concurrent programming in Haskell" materials
+
+## About the book
+
+To get more information about the source text "Parallel and Concurrent
+Programming in Haskell" by Simon Marlow, please visit the [book's web
+site][book]. You can purchase the book or read it online there for free.
+
+## Installing stack
+
+Stack is a tool for downloading, installing, and building haskell projects.  It
+takes care of handling multiple compiler versions, and supports sandboxing
+sharing build results between projects.
+
+### Windows 64bit
+
+Download and run the installer from
+[here](https://www.stackage.org/stack/windows-x86_64-installer).
+
+Also, take a look at the instructions
+[here](http://docs.haskellstack.org/en/stable/install_and_upgrade/#windows).
+While not strictly necessary, it is a good idea to use `set
+STACK_ROOT=c:\stack_root` with stack, due to windows MAX_PATH restrictions.
+
+### Mac OS
+
+```
+brew install haskell-stack
+```
+
+### Linux 64bit
+
+There are also distribution specific versions (see the "Other" section below),
+but I find this to be the most straightforward way to get a recent version:
+
+```
+wget https://github.com/commercialhaskell/stack/releases/download/v1.0.4/stack-1.0.4-linux-x86_64.tar.gz
+mkdir -p ~/.local/bin
+tar -xvf stack-1.0.4-linux-x86_64.tar.gz
+mv stack-1.0.4-linux-x86_64/stack ~/.local/bin/stack
+
+# Optionally, remove the archive and its unpacked dir
+rm -r stack-1.0.4-linux-x86_64
+rm stack-1.0.4-linux-x86_64.tar.gz
+```
+
+Then, try `which stack`. If the response is not the `.local/bin/stack` folder
+within your home directory, then you will need to add `.local/bin/stack` to your
+PATH. To do this, add the following to your `~/.profile`, and then start a new
+terminal:
+
+```
+if [ -d "$HOME/.local/bin" ] ; then
+    PATH="$HOME/.local/bin:$PATH"
+fi
+```
+
+### Other
+
+See the installation instructions
+[here](http://docs.haskellstack.org/en/stable/install_and_upgrade/).
+
+## Cloning this repo and setting up your environment
+
+Since this repo has a submodule, we need to use `--recursive` when cloning:
+
+```
+git clone --recursive https://github.com/seahug/pcph.git
+```
+
+We then ask stack to setup an appropriate version of GHC:
+
+```
+cd pcph
+stack setup
+```
+
+## Loading examples into ghci
+
+Usually we'll only want to load up a single example at a time.  `stack ghci` is
+a good way to do this:
+
+```
+mgsloan@computer:~/oss/seahug/pcph$ stack ghci --no-build :parmonad
+There were multiple candidates for the Cabal entry "Lex" (/home/mgsloan/oss/seahug/pcph/examples/parinfer/Lex.x), picking /home/mgsloan/oss/seahug/pcph/examples/parinfer/Lex.hs
+There were multiple candidates for the Cabal entry "Parse" (/home/mgsloan/oss/seahug/pcph/examples/parinfer/Parse.y), picking /home/mgsloan/oss/seahug/pcph/examples/parinfer/Parse.hs
+There were multiple candidates for the Cabal entry "Lex" (/home/mgsloan/oss/seahug/pcph/examples/parinfer/Lex.x), picking /home/mgsloan/oss/seahug/pcph/examples/parinfer/Lex.hs
+There were multiple candidates for the Cabal entry "Parse" (/home/mgsloan/oss/seahug/pcph/examples/parinfer/Parse.y), picking /home/mgsloan/oss/seahug/pcph/examples/parinfer/Parse.hs
+The following GHC options are incompatible with GHCi and have not been passed to it: -threaded
+Using main module: 1. Package `parconc-examples' component exe:parmonad with main-is file: /home/mgsloan/oss/seahug/pcph/examples/parmonad.hs
+Configuring GHCi with the following packages: parconc-examples
+GHCi, version 7.8.4: http://www.haskell.org/ghc/  :? for help
+Loading package ghc-prim ... linking ... done.
+Loading package integer-gmp ... linking ... done.
+Loading package base ... linking ... done.
+Loading package array-0.5.0.0 ... linking ... done.
+Loading package deepseq-1.3.0.2 ... linking ... done.
+Loading package containers-0.5.5.1 ... linking ... done.
+Loading package old-locale-1.0.0.6 ... linking ... done.
+Loading package time-1.4.2 ... linking ... done.
+Loading package random-1.0.1.1 ... linking ... done.
+Loading package abstract-deque-0.3 ... linking ... done.
+Loading package abstract-par-0.3.3 ... linking ... done.
+Loading package bytestring-0.10.4.0 ... linking ... done.
+Loading package cereal-0.4.1.1 ... linking ... done.
+Loading package transformers-0.3.0.0 ... linking ... done.
+Loading package mtl-2.1.3.1 ... linking ... done.
+Loading package monad-par-extras-0.3.3 ... linking ... done.
+Loading package primitive-0.6.1.0 ... linking ... done.
+Loading package vector-0.10.12.3 ... linking ... done.
+Loading package mwc-random-0.13.4.0 ... linking ... done.
+Loading package parallel-3.2.0.6 ... linking ... done.
+Loading package monad-par-0.3.4.7 ... linking ... done.
+unknown option: 'c'
+[1 of 1] Compiling Main             ( /home/mgsloan/oss/seahug/pcph/examples/parmonad.hs, interpreted )
+Ok, modules loaded: Main.
+*Main> :set args 4 5
+*Main> main
+13
+*Main> :t fib
+fib :: Integer -> Integer
+*Main> :bro
+fib :: Integer -> Integer
+main :: IO ()
+```
+
+## Building all examples
+
+To build optimized versions of the examples, run `stack build`.  Then, you can
+run the example by name by using `stack exec`.  For example, `stack exec --
+parmonad 4 5`.
+
+# License
+
+Released under MIT License
+
+[book]: http://chimera.labs.oreilly.com/books/1230000000929
+[cabal-install]: https://wiki.haskell.org/Cabal-Install
+[docker-install]: https://docs.docker.com/engine/installation/
+[docker]: https://www.docker.com/
+[ghc]: https://www.haskell.org/downloads
+[gnu-make]: https://www.gnu.org/software/make/
+[haskell-docker]: https://hub.docker.com/_/haskell/
+[network-windows]: http://neilmitchell.blogspot.com/2010/12/installing-haskell-network-library-on.html
+[official]: http://chimera.labs.oreilly.com/books/1230000000929/ch01.html#sec_sample

stack.yaml

@@ -0,0 +1,16 @@
+resolver: lts-5.11
+
+packages:
+- ./
+
+extra-deps:
+- HTTP-4000.3.3
+- network-2.5.0.0
+- distributed-process-simplelocalnet-0.2.3.2
+- normaldistribution-1.1.0.3
+
+flags:
+  parconc-examples:
+    accelerate: false
+  HTTP:
+    network-uri: false